Cinnamon Buns Co. (CBC) started 2021 with $52,000 of merchandise on hand. During 2021, $280,000 in merchandise was purchased on account with credit terms of 2/10, n/30. All discounts were taken. Purchases were all made f.o.b. shipping point. CBC paid freight charges of $9,000. Merchandise with an invoice amount of $5,000 was returned for credit. Cost of goods sold for the year was $316,000. CBC uses a perpetual inventory system. What is cost of goods available for sale, assuming CBC uses the gross method? $326,000 $330,480 $337,000 $311,480