Northwest Fur Co. started 2021 with $96,000 of merchandise inventory on hand. During 2021, $520,000 in merchandise was purchased on account with credit terms of 4/15, n/45. All discounts were taken. Purchases were all made f.o.b. shipping point. Northwest paid freight charges of $7,600. Merchandise with an invoice amount of $3,200 was returned for credit. Cost of goods sold for the year was $374,000. Northwest uses a perpetual inventory system. Assuming Northwest uses the gross method to record purchases, what is the cost of goods available for sale? Multiple Choice $599,600. $599,728. $620,400. $629,200.