D 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. A B Sales $325,000 $ $130,000 Variable expense $101,000 f. $ Fixed expense $62,000 $48,200 $44,500 Net income (loss) before tax $15,000 $15,000 $28,800 $(5,500) Units sold 30,000 d. Unit contribution margin $5.20 $7.00 Contribution margin ratio h. $ a. $ 8 $ b. d. 0.4