Helpful Hardware sells windows (80% of sales) and doors (20% of sales). The selling price of each window is $740 and of each door is $1,340. The variable cost of each window is $505 and of each door is $1,040, Fixed costs are $2.005,080. The break-even point in units using the weighted average contribution margin is Multiple Choice 5,920 units. 16,080 units 7.925 units. 5,920 units. 16,080 units 7,925 units. 10,744 units. 8,085 units