diff --git a/src/services/inventoryService.ts b/src/services/inventoryService.ts
index ef62851a..ba57fbbc 100644
--- a/src/services/inventoryService.ts
+++ b/src/services/inventoryService.ts
@@ -380,7 +380,13 @@ export const addItem = async (
                 }
             };
         } else {
-            inventory.LevelKeys.push({ ItemType: typeName, ItemCount: quantity });
+            const itemIndex = inventory.LevelKeys.findIndex(i => i.ItemType === typeName);
+
+            if (itemIndex !== -1) {
+                inventory.LevelKeys[itemIndex].ItemCount += quantity;
+            } else {
+                inventory.LevelKeys.push({ ItemType: typeName, ItemCount: quantity });
+            }
             return {
                 InventoryChanges: {
                     LevelKeys: [