Could you tell me how to do (c)?

The Gong Company produces and sells three types of jigsaws, variable speed (A), single speed (B) and variable speed with auto-scrolling (C). Budgeted data is given below: Product Sales Price Variable cost Per Sales Mix as a Unit Proportion of Total Sales $ $15 12 30 A B $30 20 40 0.1 0.5 0.4 C Budgeted total fixed costs are $700,000. Required: a. Calculate the break-even point in sales dollars for each product based on the budgeted sales mix. b. Determine the sales dollars of each product needed to generate a budgeted after tax profit of $245,000. Assume a 50% tax rate. c. Determine the sales dollars of each product needed to generate a 15% budgeted return on sales dollars after taxes