Learning Objective 3 Check Figure Contribution margin S167 800 Problem 28-2A Objective: To calculate contribution margin and prepare an income statement Rooney Corporation presents the following data for the year 20X1: Sales $560,000 Variable costs 325,000 Fixed costs 172.500 Mixed costs 96.000 Of the mixed costs, it is estimated thar 30% are fixed. Directions: Calculate the firm's contribution margin, and prepare an income statement through operating income for the year