Northwest Fur Co. started 2021 with $100,000 of merchandise inventory on hand. During 2021, $500,000 in merchandise was purchased on account with credit terms of 3/15, n/45. All discounts were taken. Purchases were all made fo.b. shipping point. Northwest paid freight charges of $8,100. Merchandise with an invoice amount of $4,500 was returned for credit. Cost of goods sold for the year was $366,000, 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 $588,735 $603,600. $606,900. $588,600 e