diff --git a/src/Bladeburner/Bladeburner.tsx b/src/Bladeburner/Bladeburner.tsx
index 59ed0432d..430fbca33 100644
--- a/src/Bladeburner/Bladeburner.tsx
+++ b/src/Bladeburner/Bladeburner.tsx
@@ -17,7 +17,7 @@ import { IAction } from "./IAction";
 import { IPlayer } from "../PersonObjects/IPlayer";
 import { createTaskTracker, ITaskTracker } from "../PersonObjects/ITaskTracker";
 import { IPerson } from "../PersonObjects/IPerson";
-import { IRouter, Page } from "../ui/Router";
+import { IRouter } from "../ui/Router";
 import { ConsoleHelpText } from "./data/Help";
 import { exceptionAlert } from "../utils/helpers/exceptionAlert";
 import { getRandomInt } from "../utils/helpers/getRandomInt";
@@ -35,7 +35,6 @@ import { getTimestamp } from "../utils/helpers/getTimestamp";
 import { joinFaction } from "../Faction/FactionHelpers";
 import { WorkerScript } from "../Netscript/WorkerScript";
 import { FactionNames } from "../Faction/data/FactionNames";
-import { BlackOperationNames } from "./data/BlackOperationNames";
 import { KEY } from "../utils/helpers/keyCodes";
 
 interface BlackOpsAttempt {
@@ -237,13 +236,13 @@ export class Bladeburner implements IBladeburner {
     }
   }
 
-  upgradeSkill(skill: Skill): void {
+  upgradeSkill(skill: Skill, count = 1): void {
     // This does NOT handle deduction of skill points
     const skillName = skill.name;
     if (this.skills[skillName]) {
-      ++this.skills[skillName];
+      this.skills[skillName] += count;
     } else {
-      this.skills[skillName] = 1;
+      this.skills[skillName] = count;
     }
     if (isNaN(this.skills[skillName]) || this.skills[skillName] < 0) {
       throw new Error("Level of Skill " + skillName + " is invalid: " + this.skills[skillName]);
@@ -2277,7 +2276,7 @@ export class Bladeburner implements IBladeburner {
     }
   }
 
-  getSkillUpgradeCostNetscriptFn(skillName: string, workerScript: WorkerScript): number {
+  getSkillUpgradeCostNetscriptFn(skillName: string, count: number, workerScript: WorkerScript): number {
     if (skillName === "" || !Skills.hasOwnProperty(skillName)) {
       workerScript.log("bladeburner.getSkillUpgradeCost", () => `Invalid skill: '${skillName}'`);
       return -1;
@@ -2285,13 +2284,13 @@ export class Bladeburner implements IBladeburner {
 
     const skill = Skills[skillName];
     if (this.skills[skillName] == null) {
-      return skill.calculateCost(0);
+      return skill.calculateCost(0, count);
     } else {
-      return skill.calculateCost(this.skills[skillName]);
+      return skill.calculateCost(this.skills[skillName], count);
     }
   }
 
-  upgradeSkillNetscriptFn(skillName: string, workerScript: WorkerScript): boolean {
+  upgradeSkillNetscriptFn(skillName: string, count: number, workerScript: WorkerScript): boolean {
     const errorLogText = `Invalid skill: '${skillName}'`;
     if (!Skills.hasOwnProperty(skillName)) {
       workerScript.log("bladeburner.upgradeSkill", () => errorLogText);
@@ -2303,10 +2302,10 @@ export class Bladeburner implements IBladeburner {
     if (this.skills[skillName] && !isNaN(this.skills[skillName])) {
       currentLevel = this.skills[skillName];
     }
-    const cost = skill.calculateCost(currentLevel);
+    const cost = skill.calculateCost(currentLevel, count);
 
-    if (skill.maxLvl && currentLevel >= skill.maxLvl) {
-      workerScript.log("bladeburner.upgradeSkill", () => `Skill '${skillName}' is already maxed.`);
+    if (skill.maxLvl && currentLevel + count > skill.maxLvl) {
+      workerScript.log("bladeburner.upgradeSkill", () => `Skill '${skillName}' cannot be upgraded ${count} time(s).`);
       return false;
     }
 
@@ -2314,13 +2313,13 @@ export class Bladeburner implements IBladeburner {
       workerScript.log(
         "bladeburner.upgradeSkill",
         () =>
-          `You do not have enough skill points to upgrade ${skillName} (You have ${this.skillPoints}, you need ${cost})`,
+          `You do not have enough skill points to upgrade ${skillName} ${count} time(s). (You have ${this.skillPoints}, you need ${cost})`,
       );
       return false;
     }
 
     this.skillPoints -= cost;
-    this.upgradeSkill(skill);
+    this.upgradeSkill(skill, count);
     workerScript.log("bladeburner.upgradeSkill", () => `'${skillName}' upgraded to level ${this.skills[skillName]}`);
     return true;
   }
diff --git a/src/Bladeburner/IBladeburner.ts b/src/Bladeburner/IBladeburner.ts
index 66f97e0f7..bcd0a3679 100644
--- a/src/Bladeburner/IBladeburner.ts
+++ b/src/Bladeburner/IBladeburner.ts
@@ -76,8 +76,8 @@ export interface IBladeburner {
   getActionEstimatedSuccessChanceNetscriptFn(person: IPerson, type: string, name: string): [number, number] | string;
   getActionCountRemainingNetscriptFn(type: string, name: string, workerScript: WorkerScript): number;
   getSkillLevelNetscriptFn(skillName: string, workerScript: WorkerScript): number;
-  getSkillUpgradeCostNetscriptFn(skillName: string, workerScript: WorkerScript): number;
-  upgradeSkillNetscriptFn(skillName: string, workerScript: WorkerScript): boolean;
+  getSkillUpgradeCostNetscriptFn(skillName: string, count: number, workerScript: WorkerScript): number;
+  upgradeSkillNetscriptFn(skillName: string, count: number, workerScript: WorkerScript): boolean;
   getTeamSizeNetscriptFn(type: string, name: string, workerScript: WorkerScript): number;
   setTeamSizeNetscriptFn(type: string, name: string, size: number, workerScript: WorkerScript): number;
   joinBladeburnerFactionNetscriptFn(workerScript: WorkerScript): boolean;
diff --git a/src/Bladeburner/Skill.ts b/src/Bladeburner/Skill.ts
index 160429ed5..32c8bc8ea 100644
--- a/src/Bladeburner/Skill.ts
+++ b/src/Bladeburner/Skill.ts
@@ -133,8 +133,37 @@ export class Skill {
     }
   }
 
-  calculateCost(currentLevel: number): number {
-    return Math.floor((this.baseCost + currentLevel * this.costInc) * BitNodeMultipliers.BladeburnerSkillCost);
+  calculateCost(currentLevel: number, count = 1): number {
+    //Recursive mode does not handle invalid inputs properly, but it should never
+    //be possible for it to run with them. For the sake of not crashing the game,
+    const recursiveMode = (currentLevel: number, count: number): number => {
+      if (count <= 1) {
+        return Math.floor((this.baseCost + currentLevel * this.costInc) * BitNodeMultipliers.BladeburnerSkillCost);
+      } else {
+        const thisUpgrade = Math.floor(
+          (this.baseCost + currentLevel * this.costInc) * BitNodeMultipliers.BladeburnerSkillCost,
+        );
+        return this.calculateCost(currentLevel + 1, count - 1) + thisUpgrade;
+      }
+    };
+
+    //Count must be a positive integer.
+    if (count < 0 || count % 1 != 0) {
+      throw new Error(`${count} is an invalid number of upgrades`);
+    }
+    //Use recursive mode if count is small
+    if (count <= 100) {
+      return recursiveMode(currentLevel, count);
+    }
+    //Use optimized mode if count is large
+    else {
+      //unFloored is roughly equivalent to
+      //(this.baseCost + currentLevel * this.costInc) * BitNodeMultipliers.BladeburnerSkillCost
+      //being repeated for increasing currentLevel
+      const preMult = (count * (2 * this.baseCost + this.costInc * (2 * currentLevel + count + 1))) / 2;
+      const unFloored = preMult * BitNodeMultipliers.BladeburnerSkillCost - count / 2;
+      return Math.floor(unFloored);
+    }
   }
 
   getMultiplier(name: string): number {
diff --git a/src/Bladeburner/ui/GeneralActionElem.tsx b/src/Bladeburner/ui/GeneralActionElem.tsx
index 7cd4b1dcc..b064b298d 100644
--- a/src/Bladeburner/ui/GeneralActionElem.tsx
+++ b/src/Bladeburner/ui/GeneralActionElem.tsx
@@ -74,7 +74,7 @@ export function GeneralActionElem(props: IProps): React.ReactElement {
           <CopyableText value={props.action.name} />
           <StartButton
             bladeburner={props.bladeburner}
-            type={ActionTypes[props.action.name ]}
+            type={ActionTypes[props.action.name]}
             name={props.action.name}
             rerender={rerender}
           />
diff --git a/src/DevMenu/ui/Augmentations.tsx b/src/DevMenu/ui/Augmentations.tsx
index 4776264bf..7f129495c 100644
--- a/src/DevMenu/ui/Augmentations.tsx
+++ b/src/DevMenu/ui/Augmentations.tsx
@@ -22,7 +22,7 @@ export function Augmentations(props: IProps): React.ReactElement {
   const [augmentation, setAugmentation] = useState("Augmented Targeting I");
 
   function setAugmentationDropdown(event: SelectChangeEvent<string>): void {
-    setAugmentation(event.target.value );
+    setAugmentation(event.target.value);
   }
   function queueAug(): void {
     props.player.queueAugmentation(augmentation);
diff --git a/src/DevMenu/ui/CodingContracts.tsx b/src/DevMenu/ui/CodingContracts.tsx
index 7ddd96494..3bc166268 100644
--- a/src/DevMenu/ui/CodingContracts.tsx
+++ b/src/DevMenu/ui/CodingContracts.tsx
@@ -15,7 +15,7 @@ import { CodingContractTypes } from "../../CodingContracts";
 export function CodingContracts(): React.ReactElement {
   const [codingcontract, setCodingcontract] = useState("Find Largest Prime Factor");
   function setCodingcontractDropdown(event: SelectChangeEvent<string>): void {
-    setCodingcontract(event.target.value );
+    setCodingcontract(event.target.value);
   }
 
   function specificContract(): void {
diff --git a/src/DevMenu/ui/Companies.tsx b/src/DevMenu/ui/Companies.tsx
index c1f98dc70..d3d40042a 100644
--- a/src/DevMenu/ui/Companies.tsx
+++ b/src/DevMenu/ui/Companies.tsx
@@ -18,7 +18,7 @@ const bigNumber = 1e12;
 export function Companies(): React.ReactElement {
   const [company, setCompany] = useState(FactionNames.ECorp as string);
   function setCompanyDropdown(event: SelectChangeEvent<string>): void {
-    setCompany(event.target.value );
+    setCompany(event.target.value);
   }
   function resetCompanyRep(): void {
     AllCompanies[company].playerReputation = 0;
diff --git a/src/DevMenu/ui/Factions.tsx b/src/DevMenu/ui/Factions.tsx
index 20322822e..6f1453ac1 100644
--- a/src/DevMenu/ui/Factions.tsx
+++ b/src/DevMenu/ui/Factions.tsx
@@ -29,7 +29,7 @@ export function Factions(props: IProps): React.ReactElement {
   const [faction, setFaction] = useState(FactionNames.Illuminati as string);
 
   function setFactionDropdown(event: SelectChangeEvent<string>): void {
-    setFaction(event.target.value );
+    setFaction(event.target.value);
   }
 
   function receiveInvite(): void {
diff --git a/src/DevMenu/ui/Programs.tsx b/src/DevMenu/ui/Programs.tsx
index 7b300e81e..830a99b2e 100644
--- a/src/DevMenu/ui/Programs.tsx
+++ b/src/DevMenu/ui/Programs.tsx
@@ -19,7 +19,7 @@ interface IProps {
 export function Programs(props: IProps): React.ReactElement {
   const [program, setProgram] = useState("NUKE.exe");
   function setProgramDropdown(event: SelectChangeEvent<string>): void {
-    setProgram(event.target.value );
+    setProgram(event.target.value);
   }
   function addProgram(): void {
     if (!props.player.hasProgram(program)) {
diff --git a/src/DevMenu/ui/Servers.tsx b/src/DevMenu/ui/Servers.tsx
index b73a935b4..db1f0e53f 100644
--- a/src/DevMenu/ui/Servers.tsx
+++ b/src/DevMenu/ui/Servers.tsx
@@ -15,7 +15,7 @@ import MenuItem from "@mui/material/MenuItem";
 export function Servers(): React.ReactElement {
   const [server, setServer] = useState("home");
   function setServerDropdown(event: SelectChangeEvent<string>): void {
-    setServer(event.target.value );
+    setServer(event.target.value);
   }
   function rootServer(): void {
     const s = GetServer(server);
diff --git a/src/Exploits/Unclickable.tsx b/src/Exploits/Unclickable.tsx
index fbcfb3c1b..1ab524d9e 100644
--- a/src/Exploits/Unclickable.tsx
+++ b/src/Exploits/Unclickable.tsx
@@ -8,8 +8,8 @@ export function Unclickable(): React.ReactElement {
 
   function unclickable(event: React.MouseEvent<HTMLDivElement>): void {
     if (!event.target || !(event.target instanceof Element)) return;
-    const display = getComputedStyle(event.target ).display;
-    const visibility = getComputedStyle(event.target ).visibility;
+    const display = getComputedStyle(event.target).display;
+    const visibility = getComputedStyle(event.target).visibility;
     if (display === "none" && visibility === "hidden" && event.isTrusted) player.giveExploit(Exploit.Unclickable);
   }
 
diff --git a/src/Hacknet/ui/HacknetNodeElem.tsx b/src/Hacknet/ui/HacknetNodeElem.tsx
index b5909027c..c5ce99c10 100644
--- a/src/Hacknet/ui/HacknetNodeElem.tsx
+++ b/src/Hacknet/ui/HacknetNodeElem.tsx
@@ -54,7 +54,7 @@ export function HacknetNodeElem(props: IProps): React.ReactElement {
       multiplier = getMaxNumberLevelUpgrades(props.player, node, HacknetNodeConstants.MaxLevel);
     } else {
       const levelsToMax = HacknetNodeConstants.MaxLevel - node.level;
-      multiplier = Math.min(levelsToMax, purchaseMult );
+      multiplier = Math.min(levelsToMax, purchaseMult);
     }
 
     const increase =
@@ -94,7 +94,7 @@ export function HacknetNodeElem(props: IProps): React.ReactElement {
       multiplier = getMaxNumberRamUpgrades(props.player, node, HacknetNodeConstants.MaxRam);
     } else {
       const levelsToMax = Math.round(Math.log2(HacknetNodeConstants.MaxRam / node.ram));
-      multiplier = Math.min(levelsToMax, purchaseMult );
+      multiplier = Math.min(levelsToMax, purchaseMult);
     }
 
     const increase =
@@ -144,7 +144,7 @@ export function HacknetNodeElem(props: IProps): React.ReactElement {
       multiplier = getMaxNumberCoreUpgrades(props.player, node, HacknetNodeConstants.MaxCores);
     } else {
       const levelsToMax = HacknetNodeConstants.MaxCores - node.cores;
-      multiplier = Math.min(levelsToMax, purchaseMult );
+      multiplier = Math.min(levelsToMax, purchaseMult);
     }
 
     const increase =
diff --git a/src/NetscriptFunctions/Bladeburner.ts b/src/NetscriptFunctions/Bladeburner.ts
index e96a4efbf..0cc5c47ea 100644
--- a/src/NetscriptFunctions/Bladeburner.ts
+++ b/src/NetscriptFunctions/Bladeburner.ts
@@ -279,26 +279,28 @@ export function NetscriptBladeburner(player: IPlayer, workerScript: WorkerScript
       },
     getSkillUpgradeCost:
       (ctx: NetscriptContext) =>
-      (_skillName: unknown): number => {
+      (_skillName: unknown, _count: unknown = 1): number => {
         const skillName = ctx.helper.string("skillName", _skillName);
+        const count = ctx.helper.number("count", _count);
         checkBladeburnerAccess(ctx);
         const bladeburner = player.bladeburner;
         if (bladeburner === null) throw new Error("Should not be called without Bladeburner");
         try {
-          return bladeburner.getSkillUpgradeCostNetscriptFn(skillName, workerScript);
+          return bladeburner.getSkillUpgradeCostNetscriptFn(skillName, count, workerScript);
         } catch (e: any) {
           throw ctx.makeRuntimeErrorMsg(e);
         }
       },
     upgradeSkill:
       (ctx: NetscriptContext) =>
-      (_skillName: unknown): boolean => {
+      (_skillName: unknown, _count: unknown = 1): boolean => {
         const skillName = ctx.helper.string("skillName", _skillName);
+        const count = ctx.helper.number("count", _count);
         checkBladeburnerAccess(ctx);
         const bladeburner = player.bladeburner;
         if (bladeburner === null) throw new Error("Should not be called without Bladeburner");
         try {
-          return bladeburner.upgradeSkillNetscriptFn(skillName, workerScript);
+          return bladeburner.upgradeSkillNetscriptFn(skillName, count, workerScript);
         } catch (e: any) {
           throw ctx.makeRuntimeErrorMsg(e);
         }
diff --git a/src/NetscriptFunctions/Corporation.ts b/src/NetscriptFunctions/Corporation.ts
index 9ed771625..b6abb18e0 100644
--- a/src/NetscriptFunctions/Corporation.ts
+++ b/src/NetscriptFunctions/Corporation.ts
@@ -257,7 +257,7 @@ export function NetscriptCorporation(player: IPlayer, workerScript: WorkerScript
 
   function getMaterial(divisionName: string, cityName: string, materialName: string): Material {
     const warehouse = getWarehouse(divisionName, cityName);
-    const matName = (materialName ).replace(/ /g, "");
+    const matName = materialName.replace(/ /g, "");
     const material = warehouse.materials[matName];
     if (material === undefined) throw new Error(`Invalid material name: '${materialName}'`);
     return material;
@@ -725,9 +725,11 @@ export function NetscriptCorporation(player: IPlayer, workerScript: WorkerScript
         const employeeName = ctx.helper.string("employeeName", _employeeName);
         const job = ctx.helper.string("job", _job);
         const employee = getEmployee(divisionName, cityName, employeeName);
-        return netscriptDelay(["Training", "Unassigned"].includes(employee.pos) ? 0 : 1000, workerScript).then(function () {
-          return Promise.resolve(AssignJob(employee, job));
-        });
+        return netscriptDelay(["Training", "Unassigned"].includes(employee.pos) ? 0 : 1000, workerScript).then(
+          function () {
+            return Promise.resolve(AssignJob(employee, job));
+          },
+        );
       },
     hireEmployee:
       (ctx: NetscriptContext) =>
diff --git a/src/ScriptEditor/NetscriptDefinitions.d.ts b/src/ScriptEditor/NetscriptDefinitions.d.ts
index 0177aee7e..bfed1d166 100644
--- a/src/ScriptEditor/NetscriptDefinitions.d.ts
+++ b/src/ScriptEditor/NetscriptDefinitions.d.ts
@@ -3080,28 +3080,30 @@ export interface Bladeburner {
    * @remarks
    * RAM cost: 4 GB
    *
-   * This function returns the number of skill points needed to upgrade the specified skill.
+   * This function returns the number of skill points needed to upgrade the specified skill the specified number of times.
    *
    * The function returns -1 if an invalid skill name is passed in.
    *
    * @param skillName - Name of skill. Case-sensitive and must be an exact match
+   * @param count - Number of times to upgrade the skill. Defaults to 1 if not specified.
    * @returns Number of skill points needed to upgrade the specified skill.
    */
-  getSkillUpgradeCost(name: string): number;
+  getSkillUpgradeCost(name: string, count?: number): number;
 
   /**
    * Upgrade skill.
    * @remarks
    * RAM cost: 4 GB
    *
-   * Attempts to upgrade the specified Bladeburner skill.
+   * Attempts to upgrade the specified Bladeburner skill the specified number of times.
    *
    * Returns true if the skill is successfully upgraded, and false otherwise.
    *
    * @param skillName - Name of skill to be upgraded. Case-sensitive and must be an exact match
+   * @param count - Number of times to upgrade the skill. Defaults to 1 if not specified.
    * @returns true if the skill is successfully upgraded, and false otherwise.
    */
-  upgradeSkill(name: string): boolean;
+  upgradeSkill(name: string, count?: number): boolean;
 
   /**
    * Get team size.
diff --git a/src/ScriptEditor/ui/ScriptEditorRoot.tsx b/src/ScriptEditor/ui/ScriptEditorRoot.tsx
index 24780072a..13c2a43d8 100644
--- a/src/ScriptEditor/ui/ScriptEditorRoot.tsx
+++ b/src/ScriptEditor/ui/ScriptEditorRoot.tsx
@@ -693,7 +693,7 @@ export function Root(props: IProps): React.ReactElement {
     if (server === null) throw new Error(`Server '${closingScript.hostname}' should not be null, but it is.`);
 
     const serverScriptIndex = server.scripts.findIndex((script) => script.filename === closingScript.fileName);
-    if (serverScriptIndex === -1 || savedScriptCode !== server.scripts[serverScriptIndex ].code) {
+    if (serverScriptIndex === -1 || savedScriptCode !== server.scripts[serverScriptIndex].code) {
       PromptEvent.emit({
         txt: `Do you want to save changes to ${closingScript.fileName} on ${closingScript.hostname}?`,
         resolve: (result: boolean | string) => {
diff --git a/src/StockMarket/Stock.ts b/src/StockMarket/Stock.ts
index f6e27db31..d001e7e50 100644
--- a/src/StockMarket/Stock.ts
+++ b/src/StockMarket/Stock.ts
@@ -36,7 +36,7 @@ function toNumber(n: number | IMinMaxRange): number {
       return n;
     }
     case "object": {
-      const range = n ;
+      const range = n;
       value = getRandomInt(range.min, range.max);
       break;
     }
diff --git a/src/StockMarket/StockMarket.tsx b/src/StockMarket/StockMarket.tsx
index 208c6e765..96527f0f2 100644
--- a/src/StockMarket/StockMarket.tsx
+++ b/src/StockMarket/StockMarket.tsx
@@ -68,7 +68,7 @@ export function placeOrder(
 
   // Process to see if it should be executed immediately
   const processOrderRefs = {
-    stockMarket: StockMarket ,
+    stockMarket: StockMarket,
     symbolToStockMap: SymbolToStockMap,
   };
   processOrders(stock, order.type, order.pos, processOrderRefs);
diff --git a/src/Terminal/commands/mv.ts b/src/Terminal/commands/mv.ts
index 2961aa891..f7f04ad94 100644
--- a/src/Terminal/commands/mv.ts
+++ b/src/Terminal/commands/mv.ts
@@ -84,7 +84,7 @@ export function mv(
 
       script.filename = destPath;
     } else if (srcFile instanceof TextFile) {
-      const textFile = srcFile ;
+      const textFile = srcFile;
       if (!dest.endsWith(".txt")) {
         terminal.error(`Source and destination files must have the same type`);
         return;
diff --git a/src/TextFile.ts b/src/TextFile.ts
index 8ee024795..91d68c374 100644
--- a/src/TextFile.ts
+++ b/src/TextFile.ts
@@ -121,7 +121,7 @@ export function getTextFile(fn: string, server: BaseServer): TextFile | null {
     filename = removeLeadingSlash(filename);
   }
 
-  for (const file of server.textFiles ) {
+  for (const file of server.textFiles) {
     if (file.fn === filename) {
       return file;
     }