Brief Exercise 19-01 Determine the missing amounts. Unit Selling Unit Variable Price Costs Unit Contribution Margin Contribution Margin Ratio 1. $300 $210 (a) % (b) 2. $600 (c) $300 % (d) 3. (e) (0) $ $320 20 % Click if you would like to Show Work for this question: Open Show Work LINK TO TEXT