Calculate the missing numbers in the following situations. (Input all amounts as positive values.) Invoice cost of merchandise purchases Purchase discounts Purchase returns and allowances Cost of transportation-in Merchandise inventory (beginning of period) Net cost of merchandise purchases Merchandise inventory (end of period) Cost of goods sold $ a 44,900 2,900 1,950 5,400 45,600 2,650 69 b 21,900 $ 840 2,200 C 17,150 370 640 2,900 4,400 20,200 16,510 4,200 20,710 $ 21,700 $ 17,965

Calculate the missing numbers in the following situations. (Input all amounts as positive values.)