XYZ Company produces two models of wood chairs, A and B. The selling price per unit and the variable manufacturing cost per unit for model A are $240 and $140 respectively. The selling price per unit and the variable manufacturing cost per unit for model B are $320 and $152 respectively. The variable selling expense per unit for models A and B are $40 per unit and 548 per unit respectively. Assume that total fixed expenses are $158,400 per month and the expected monthly sales for models A and B are 7,200 units and 1,800 units respectively. If the sales mix and sales units are as expected, the break-even in sales (5) is: (round figures to the nearest number) Select one: a. 356,958 . b. 262,632 c563,200 O d. None of the given answers e 389,908