Assuming that perpetual inventory records are kept in units only, the ending inventory on an average-cost basis, is (Round average cost per unit to 2 decimal places, e.g. 1.48.) $15712.$16590.$16470.$16274. Sheffield Co. records purchases at net amounts. On May 5 Sheffield purchased merchandise on account, $94000, terms 2/10,n/30. Sheffield returned $5100 of the May 5 purchase and received credit on account. At May 31 , the balance had not yet been paid. By how much should the account payable be adjusted on May 31? $1982. $1778. $0. $1880