supplies. Ross uses a perpetual inventory system. The following transactions (summarized) have been selected for analysis: a. Sold merchandise for cash (cost of merchandise $29,877). $ 53,120 b. Received merchandise returned by customers as unsatisfactory (but in perfect condition) for cash refund (original cost of merchandise $250). 280 c. Sold merchandise (costing $5,605) to a customer on account with terms n/60. 11,800 d. Collected half of the balance owed by the customer in (c). 5,900 e. Granted a partial allowance relating to credit sales the customer in (c) had not yet paid. 166 f. Anticipate further returns of merchandise (costing $170) after year-end from sales made during the year