there are four questions in the pictures

Question Five Sports Accessories Lid produces two products in the same workshop located at Parramatta. Below information is related to the production of Treadmill and Rower two products of the company. Product type Sales price Cost Sales commission Treadmill $4 000 $680 $120 Rower $3 000 $470 $130 60% of the Sports Accessories Lid sales are Treadmill and 40% is Rower. The annual fixed costs of the company are $11 520 000. Ignore income taxes. Required: a) Calculate the unit contribution margin for each product type of Tredmill and Rower. (7 marks) b) Calculate the weighted average unit contribution margin, assuming a constant sales mix of Treadmill and Rower. (6 marks) c) What is the Sports Accessories Lid break-even sales revenue in dollars? Assume a constant sales mix of the two types of products. (6 marks) d) How many of each of Treadmill and Rower must be sold to earn a target net profit of $3 000 000? Assume a constant sales mix of Commuting and Track bikes (6 marks)