The beginning inventory for Midnight Supplies and data on purchases and sales for a three month period are as follows: Date Transaction Number of Units Per Unit Total

Jan. 1 Inventory 7,500 $75.00 $562,500
10 Purchase 22,500 85.00 1,912,500
28 Sale 11,250 150.00 1,687,500
30 Sale 3,750 150.00 562,500
Feb. 5 Sale 1,500 150.00 225,000
10 Purchase 54,000 87.50 4,725,000
16 Sale 27,000 160.00 4,320,000
28 Sale 25,500 160.00 4,080,000
Mar. 5 Purchase 45,000 89.50 4,027,500
14 Sale 30,000 160.00 4,800,000
25 Purchase 7,500 90.00 675,000
30 Sale 26,250 160.00 4,200,000

Required:
a. Determine the inventory on March 31 and the cost of merchandise sold for the three-month period, using the first-in, first-out method and the periodic inventory system.
b. Determine the inventory on March 31 and the cost of merchandise sold for the three-month period, using the last-in, first-out method and the periodic inventory system.
c. Determine the inventory on March 31 and the cost of merchandise sold for the three-month period, using the weighted average cost method and the periodic inventory system.