a. Determine the cost of goods sold and ending m 10 books costing $18 each 4 books costing $18 each and 9 books costing $21 each 2 books costing $21 each and 2 thooks costing $28 each August 3 August 15: August 28: hand at the end of the period. (Enter the oldest inventory layers first ) Cost of Goods Sold Inventory on Hand Unit Total Unit Total 16 S 18 S 288 6 S 18 108 6 $ 18 108 12 s 21 252 2 18S 36 3 21 5 63 2 S18 s 3 21 $ 3 S 28 s 2 S 18 s 1 S 21 5 21 10 $ 18 $ 180 12 S 21 5 252 4 $ 18 72 9 21 $ 189 31S 281S 84 2 5 21 s 42 2 28 56 5 336 S 539 15 27 have been entered into the perpetual record calculate the 2 Clear All 3 S 28$ 84 2 21542 s28 28 $ 336 27 have been hand at the end of the period. (Enter the oldest inventory layers first ) Total Total Unit Unit Cost Aug. 1 Clear All