item 33 cinnamon buns co. (cbc) started 2021 with $53,900 of merchandise on hand. during 2021, $281,000 in merchandise was purchased on account with credit terms of 4/10 n/30. all discounts were taken. purchases were all made f.o.b. shipping point. cbc paid freight charges of $9,900. merchandise with an invoice amount of $3,700 was returned for credit. cost of goods sold for the year was $303,000. cbc uses a perpetual inventory system. what is cost of goods available for sale, assuming cbc uses the gross method?