In the following table, there appear income statements for four hypothetical companies. Each income statement is missing three numbers; you are to determine these missing numbers. Assume taxes are part of period expenses.) Co. W Co. X Co.Y Co.Z $2.250 $1.800 $1,350 52,100 Sales Cost of Goods Sold Beginning Inventory Plus: Purchases Less: Ending Inventory $2,100 225 300 300 975 225 850 1,200 300 300 Cost of Goods Sold ? 900 750 Gross Margin Period Expenses Net Income (loss)? 300 400 150 $ ? S 150 (50)