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closest to (assume that the increase is within the relevant range): A) $11.20 B) $24.40 C) $28.50 D) $22.80 22) Tire Corporation has provided the following information: If the selling price is $27.30 per unit, the contribution margin per unit sold is closest to: A) $12.65 B) $10.50 C) $7.40 D) $15.90