Wildhorse Inc. uses the FIFO cost formula in a perpetual inventory system. Jul 1 Beginning inventory 31 units @ $30 per unit Jul 7 Purchases Jul 8 Sales 81 units @ $42 per unit Jul 9 Sales Jul 10 Purchases Jul 22 Sales 61 units 36 units 61 units @ $33 per unit 51 units The cost of goods sold for the July 9 sale was O $1570. O $1476. O $1512. O $1618