of Z-Mart purchased $4,000 worth of merchandise on credit. Transportation costs were an additional $350, paid cash to the cartage company on delivery. Z-Mart returned $275 worth of merchandise and paid the invoice on time, and took a 2% purchase discount. The amount of the payment was: O a. $3,995.00 O b. $3,993.50 O c. $3,725.00 O d. $3,600.50