Determine the missing amounts. Unit Selling Price 1. 2. 3. GA $300 $500 (e) A +A Unit Variable Costs $291 (c) +A Unit Contribution Margin C M (a) $280 (f) $300 Determine the missing amounts. elling ce Unit Variable Costs Unit Contribution Margin Contribution Margin Ratio % (b) $300 $291 A (a) $500 A (c) $280 do % (e) $ (f) $300 30 % (d)