A furniture manufacturer specializes in wood tables. The tables sell for $110 per unit and incur $60 per unit in variable costs. The company has $2, per month. Read the requirements. 7. What is the total contribution margin for the month when the company sells 580 tables? The contribution margin is $ 8. What is the unit contribution margin? Select the formula labels and then entering the amounts to compute the contribution margin per unit. Unit contribution margin 9. What is the contribution margin ratio? Select the formula labels and then enter the amounts to compute the contribution margin ratio. (Round your answer to the nearest percent, X%.) Contribution margin ratio