- Handy Home sells windows and doors in the ratio of 73 (Windows doors). The selling price of each window is $107 and of each door is $257. The variable cost of a window is $66.00 and of a door is $178.50. Fixed costs are $705,375. (Enter your per unit" values in two decimal places.) Dharmant Total per composite unit (1) Determine the selling price per composite unit. Quantity Selling Price per unit Windows Doors Total per composite unit (2) Determine the variable costs per composite unit. Quantity Variable costs per unit Windows Doors Contribution margin per composite unit 0.00 0.00 Contribution margin (3) Determine the break-even point in composite units. Choose Numerator: 1 Choose Denominator: / 11 Break Even Units Break even units (4) Determine the number of units of each product that will be sold at the break-even point. Number of composite units to Quantity Unit sales at break-even point break even. Windows Doors