AutoSave 4) Obed Corp., makes three models of high performance cross country ski machines. Current operating data are summarized below: YourSki OurSki MySki $400 Selling Price/Unit Variable Cost/Unit $250 $500 $150 $200 $100 500 600 400 Monthly Sales Volume Fixed expenses per month total $185,820 (a) Calculate the contribution margin ratio for each product. (b) Calculate the firm's overall contribution margin ratio. (c) Calculate the firm's break-even point in sales dollar. (d) Calculate the firm's operating income. (e) Management is considering the elimination of the OurSki model due to low sales volume. As a result, total fixed expenses can be reduced by $60,000 per month. Assuming that this change would not affect the other models, would you recommend the elimination of the OurSki model