(2) The Derby Shoe Company produces its famous shoe, the Divine Loafer that sells for $80 per pair. Operating information for 2020 is as follows: Sales revenue $400,000 Total Variable cost $150,000 Total Fixed cost $100,000 Required: 1) Calculate contribution margin and operating income. 2) Calculate the breakeven point in units and the breakeven revenues. 3) How many shoe s must the company sell in order to reach? a) a target operating income of $450,000? b) a net income of $450,000