Exercise 22-18 CVP analysis using weighted-average contribution margin L.O. P4 Home Builders sells windows and doors in the ratio of 7:3 (windows:doors). The selling price of each window is $109 and of each door is $259. The variable cost of a window is $67.00 and of a door is $179.50. Fixed costs are $580,425. (1) Determine the weighted-average contribution margin per unit. (Round your answer to 2 decimal places. Omit the "$" sign in your response.) Contribution margin? (2) Determine the break-even point in units. Break-even point? (3) Determine the number of units of each product that will be sold at the break-even point. (Round your intermediate calculation to 2 decimal places.) Unit sales of windows at break-even point? Unit sales of doors at break-even point