Exercise $5-22($Algo$)$ CVP analysis with two products LO P$3$

Handy Home sells windows $(30\%$ of sales$)$ and doors $(70\%$ of sales$).$ The selling price of each window is $$370$ and of each door is

$$840.$ The variable cost of each window is $$210$ and of each door is $$520.$ Fixed costs are $$1,577,600.$

$(1)$ Compute the weighted$-$average contribution margin.

Weighted$-$average contribution margin

$(2)$ Compute the break$-$even point in units using the weighted$-$average contribution margin.