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 $18.00 $12.00 Fancy $28.00 $20.00 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. $3.40 O b. $6.80 c. $14 O d. $7 e. $7.20