Grouper Corporation sells one product, with information for July as follows: July 1 Inventory 100 units at $17.00 each 4 Sale 80 units at $18.00 each 11 Purchase 150 units at $16.00 each 13 Sale 120 units at $18.80 each 22 20 Purchase 160 units at $17.20 each 27 Sale 100 units at $20.80 each Grouper uses the FIFO cost formula. All purchases and sales are on account. Ignore any estimated returns on purchases and sales.