Helpful Hardware sells windows $(80\%$ of sales$)$ and doors $(20\%$ of sales$).$ The selling price of each window is $$680$ and of each door is $$1,280.$ The variable cost of each window is $$460$ and of each door is $$980.$ Fixed costs are $$1,904,520.$ The weighted$-$average contribution margin is:

Multiple Choice

$$396.$

$$236.$

$$520.$

$$204.$

$$ $$294$