- stores - list all stores
- at STORE_ID - (!shop at STORE_ID) list all items assigned to store and use this store for future commands
- assign ITEM_ID - assign item to last used store id
- buy - mark item as purchased
- clear STORE_ID - clear all purchased items for STORE_ID from database
+ at STORE_ID - use this store for future commands
+ buy ID ID ID - mark items as purchased
+ clear STORE - clear all purchased items for STORE