XYZ Inc. is considering a change in inventory cost flow from FIFO to LIFO or weighted average. The company uses a periodic inventory system. Refer to the information provided.

Sales Inventory, January 1 Purchases Purchase Purchase Inventory, December 31 Operating Expenses 15,750 units at $ 37.50 each 4,500 units at $ 15.00 each 4,500 units at $ 16.50 each 7,500 units at $18.75 each 5,250 units at $ 22.50 each 6,000 units at ? each $187,500 a. Calculate income from operations using the periodic FIFO cost flow method (show your work): (5 pts) b. Calculate income from operations using the periodic LIFO cost flow method (show your work): (5 pts) c. Calculate income from operations using the periodic weighted average cost flow method rounding the average cost per unit to two decimals (show your work): (5 pts)