The inventory records of RST indicate the following regarding its best-selling product in the month of January:

Required:
Calculate the dollar amount of ending inventory and cost of goods sold under each of the following cost flow assumptions:
a. Weighted-average cost, periodic inventory'.
b. First-in, first-out (FIFO), perpetual inventory.
c. Weighted-average cost, perpetual inventory.

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Units 3,000 2,000 (1,500) 4,000 Unit cost $8.00 $7.65 Opening inventory Purchase #1 Purchase #2 Sale #2 Total 57.50 5,000