A company, selling 3 products has monthly fixed costs of: $150,000 Expected unit data are as follows: Marks: Required: 3 a. Determine the sales mix based on Sales units as a percentage. 2 b. Determine the weighted-average contribution margin ratio. 1 c. Determine the weighted-average variable expense ratio. 2 d. Determine monthly total company sales in dollars to break even. 3 e. For each product and for the company in total, determine the weighted average contribution margin per unit