Use your knowledge of CVP relationships to fill in the missing pieces numbered (1) through (9). Consider each company (i.e., column) separately. (Round variable cost per unit and contribution margin ratio to 2 decimal places, e.g. 0.24.) Selling price A $4 B $800 Total fixed costs $11,000 (4) $4. Sales volume (units) 28,000 2,500 Variable cost/unit (1) $320 (5) $21 Operating income $20,360 Tax rate % (2) 25% After-tax profit Contribution margin ratio $14,252 $801,000 (3) (6)