Please answer both a and b question

Suppose Toys Plus uses the perpetual inventory system and buys $100,000 of LEGO toys on credit terms of 2/15, n/45. Some of the goods are damaged in shipment, so Toys Plus returns $12,500 of the merchandise to LEGO. How much must Toys Plus pay LEGO: a. After the discount period? b. Within the discount period? a. How much must Toys Plus pay LEGO after the discount period? Original purchase amount by Toys Plus Less: Purchase returns Amount owed by Toys Plus after purchase return 11 and after the discount period