Weighted average cost method with perpetual inventory The beginning inventory at Midnight Supplies and data on purchases and sales for a three-month period ending March 31 are as follows: Number Date Transaction of Units Per Unit Total Jan. 1 Inventory 9,000 $60.00 $540,000 Jan. 10 Purchase 21,000 70.00 1,470,000 Jan. 28 Sale 10,250 140.00 1,435,000 Jan. 30 Sale 5,750 140.00 805,000 Feb. 5 Sale 3,500 140.00 Feb. 10 Purchase 39,500 490,000 75.00 2,962,500 Feb. 16 Sale 15,000 150.00 2,250,000 Feb. 28 Sale 10,000 Mar. 5 Purchase 25,000 82.00 150.00 1,500,000 2,050,000 Mar. 14 Sale 30,000 150.00 4,500,000 Mar. 25 Purchase 10,000 88.40 884,000 Mar. 30 Sale 19,000 150.00 2,850,000 Cost of Purchase Purchases Purchase Date Quantity Un Cast Jan. 2 10 28 35 110-000 Cost of Cost of Total Cost Quantity Un 000 00 0 0 1 1 11 111 | 11 | 10 T