Assume the perpetual inventory method is used. 1) The company purchased $13,200 of merchandise on account under terms 3/10, n/30. 2) The company returned $2,700 of merchandise to the supplier before payment was made. 3) The liability was paid within the discount period. 4) All of the merchandise purchased was sold for $20,400 cash. The amount of gross margin from the four transactions is: Multiple Choice O $7,200 O $6,984. $10,215. O O $10.296