The following information is taken from the records of four different companies in the same industry: D 90 12 63 Sales Opening Inventory Purchases Cost of Goods Available for Sale Ending Inventory Cost of Goods Sold Gross Profit A $300 ? 240 320 ? ? $100 B. $150 40 ? ? (60) 100 $ ? C $ ? 40 ? 190 (60) 130 $ 65 ampiri ) (15) 60 Gross Profit percentage ? ? ? a. Calculate the missing amounts. b. Which company seems to be performing best? Why