A company purchases inventory on Jan. 15^th for $5000 with credit terms n/30 4/10. On Jan. 18^th, they realized that $2000 of the inventory was damaged and returned it to the seller. The company paid on January 23^rd. The journal entry to record this payment on January 23^rd would include?

The answer is Credit Inventory 120. I am not sure why this is the answer.