17. In a perpetual inventory system, beginning inventory, purchases, and sales of an item are as follows: June 1 June 11 June 15 June 21 June 27 Inventory Sale Purchase Sale Purchase 60 units at $9.00 40 units at $15.00 30 units at $10.00 40 units at $12.00 56 units at $9.90 a. Using the FIFO method, calculate the gross profit for the month of June; if applicable, round answers to two decimal places (10 points): b. Using the FIFO method, calculate the cost of inventory on June 30; if applicable, round answers to two decimal places (5 points)