Prepare journal entries for the following credit card sales transactions (the company uses the perpetual inventory system).

a. Sold $21,000 of merchandise, that cost $15,800, on MasterCard credit cards. MasterCard charges a 5% fee.

b. record the cost of sales 15800

c. Sold $5,100 of merchandise, that cost $3,050, on an assortment of bank credit cards. These cards charge a 4% fee.

d. record the cost of sales.