Part B (12 Marks) James Ltd manufactures 6.6kW solar panels. Unit data for 6.6kW solar panel model are as follows: Solar panel model Selling price $2100 Variable costs and expenses Direct materials 350 Direct labour 250 500 Manufacturing overhead Selling and administrative Total variable costs and expenses 370 $1470 The fixed costs are: manufacturing overhead $200 300, and selling and administrative expenses $90100. Required: (a) Calculate the contribution margin ratio for the solar panel model. (3 Marks) (b) Calculate the break-even point in dollars for the solar panel model