Bobbie manages a small kiosk that sells two products: widgets and gadgets. Sales mix in terms of units sold is 25% and 75%, respectively. The respective unit contribution margins are $240 and $80. How many widgets does Bobbie sell at the break-even point if monthly fixed costs are $120,000?

A : 160 widgets

B : 750 widgets

C : 1,000 widgets

D : 250 widgets