diff --git a/src/services/inventoryService.ts b/src/services/inventoryService.ts
index a2071b2c..4f6ca9d6 100644
--- a/src/services/inventoryService.ts
+++ b/src/services/inventoryService.ts
@@ -26,7 +26,8 @@ import {
     ILibraryDailyTaskInfo,
     ICalendarProgress,
     IDroneClient,
-    IUpgradeClient
+    IUpgradeClient,
+    ISlots
 } from "@/src/types/inventoryTypes/inventoryTypes";
 import { IGenericUpdate } from "../types/genericUpdate";
 import {
@@ -159,10 +160,31 @@ export const getInventory = async (
     return inventory;
 };
 
+const occupySlot = (
+    inventory: TInventoryDatabaseDocument,
+    bin: InventorySlot,
+    premiumPurchase: boolean
+): IInventoryChanges => {
+    const slotChanges = {
+        Slots: 0,
+        Extra: 0
+    };
+    if (premiumPurchase) {
+        slotChanges.Extra += 1;
+    } else {
+        slotChanges.Slots -= 1;
+    }
+    updateSlots(inventory, bin, slotChanges.Slots, slotChanges.Extra);
+    return {
+        [bin]: slotChanges satisfies ISlots
+    };
+};
+
 export const addItem = async (
     inventory: TInventoryDatabaseDocument,
     typeName: string,
-    quantity: number = 1
+    quantity: number = 1,
+    premiumPurchase: boolean = false
 ): Promise<{ InventoryChanges: IInventoryChanges }> => {
     // Bundles are technically StoreItems but a) they don't have a normal counterpart, and b) they are used in non-StoreItem contexts, e.g. email attachments.
     if (typeName in ExportBundles) {
@@ -305,11 +327,10 @@ export const addItem = async (
                     combineInventoryChanges(inventoryChanges, await addItem(inventory, item, 1));
                 }
             }
-            updateSlots(inventory, InventorySlot.WEAPONS, 0, 1);
             return {
                 InventoryChanges: {
                     ...inventoryChanges,
-                    WeaponBin: { count: 1, platinum: 0, Slots: -1 }
+                    ...occupySlot(inventory, InventorySlot.WEAPONS, premiumPurchase)
                 }
             };
         } else {
@@ -378,44 +399,26 @@ export const addItem = async (
         case "Powersuits":
             switch (typeName.substr(1).split("/")[2]) {
                 default: {
-                    const inventoryChanges = addPowerSuit(inventory, typeName);
-                    updateSlots(inventory, InventorySlot.SUITS, 0, 1);
                     return {
                         InventoryChanges: {
-                            ...inventoryChanges,
-                            SuitBin: {
-                                count: 1,
-                                platinum: 0,
-                                Slots: -1
-                            }
+                            ...addPowerSuit(inventory, typeName),
+                            ...occupySlot(inventory, InventorySlot.SUITS, premiumPurchase)
                         }
                     };
                 }
                 case "Archwing": {
-                    const inventoryChanges = addSpaceSuit(inventory, typeName);
-                    updateSlots(inventory, InventorySlot.SPACESUITS, 0, 1);
                     return {
                         InventoryChanges: {
-                            ...inventoryChanges,
-                            SpaceSuitBin: {
-                                count: 1,
-                                platinum: 0,
-                                Slots: -1
-                            }
+                            ...addSpaceSuit(inventory, typeName),
+                            ...occupySlot(inventory, InventorySlot.SPACESUITS, premiumPurchase)
                         }
                     };
                 }
                 case "EntratiMech": {
-                    const inventoryChanges = addMechSuit(inventory, typeName);
-                    updateSlots(inventory, InventorySlot.MECHSUITS, 0, 1);
                     return {
                         InventoryChanges: {
-                            ...inventoryChanges,
-                            MechBin: {
-                                count: 1,
-                                platinum: 0,
-                                Slots: -1
-                            }
+                            ...addMechSuit(inventory, typeName),
+                            ...occupySlot(inventory, InventorySlot.MECHSUITS, premiumPurchase)
                         }
                     };
                 }
@@ -446,12 +449,10 @@ export const addItem = async (
         case "Types":
             switch (typeName.substr(1).split("/")[2]) {
                 case "Sentinels": {
-                    const inventoryChanges = addSentinel(inventory, typeName);
-                    updateSlots(inventory, InventorySlot.SENTINELS, 0, 1);
                     return {
                         InventoryChanges: {
-                            ...inventoryChanges,
-                            SentinelBin: { count: 1, platinum: 0, Slots: -1 }
+                            ...addSentinel(inventory, typeName),
+                            ...occupySlot(inventory, InventorySlot.SENTINELS, premiumPurchase)
                         }
                     };
                 }
diff --git a/src/services/purchaseService.ts b/src/services/purchaseService.ts
index 76a6d111..cd6e7cad 100644
--- a/src/services/purchaseService.ts
+++ b/src/services/purchaseService.ts
@@ -251,7 +251,7 @@ export const handleStoreItemAcquisition = async (
         }
         switch (storeCategory) {
             default: {
-                purchaseResponse = await addItem(inventory, internalName, quantity);
+                purchaseResponse = await addItem(inventory, internalName, quantity, true);
                 break;
             }
             case "Types":