c. $ e. Net Income Planning Selected operating data for Oakbrook Company in four independent situations are shown below. Fill in the blanks for each independent situation. B D Sales $350,000 $ $520,000 Variable expense $111,000 f. $ g Fixed expense b. $62,000 $53,200 $178,000 Net income (loss) before tax $25,000 $15,000 $28,800 $(22,000) Units sold 30,000 Unit contribution margin $5.20 $7.00 Contribution margin ratio h. $ a. $ $ d. 0.4