Consider the following data. Maxie Pty Ltd makes and sells two types of shoes, Plain and Fancy. Product data is as follows: Unit selling price Variable costs per unit Plain $20.00 $12.00 Fancy $35.00 $24.50 Sixty per cent of the sales in units are Fancy and annual fixed expenses are $45,000. Determine the weighted average unit contribution margin. Select one: a. $9 b. $4.80 c. $9.50 d. $17 e. $18.50