E5-3 Calculating Contribution Margin and Contribution Ratio, Preparing Contribution Margin Income Statement [LO 5-5] Moming Dove Company manufactures one model of birdbath, which is very popular. Morning Dove sells all units it produces each month. The relevant range is 0-1,500 units, and monthly production costs for the production of 1,200 units follow. Morning Dove's utilities and maintenance costs are mixed with the fixed components shown in parentheses. Production Costs Direct materials Direct labor Utilities ($110 fixed) Supervisor's salary Maintenance ($300 fixed) Total Cost 1,700 6,700 550 2.800 530 850 Suppose it sells each birdbath for $30 Required 1. Calculate the unit contribution margin and contribution margin ratio for each birdbath sold. (Round Variable cost per unit to 2 decimal places. Enter all amounts as positive values.) Unit Contribution Margin per Birdbath Contribution Margin Ratio