Pro Bike manufactures and sells two types of bikes: road bikes and mountain bikes. The company sold 500 units of each type of bike during the year. Per unit Sales price Variable cost of goods sold Road bikes $ 1,400 Mountain bikes $ 1,000 450 70 850 60 Variable selling and administrative expenses a. Compute contribution margin (in dollars) for each product. b. Compute contribution margin ratio for each product. Which product has the better contribution margin ratio? Complete this question by entering your answers in the tabs below. Required A Required B Compute total contribution margin (in dollars) for each product. Contribution margin Road bikes Mountain bikes < Required A Required B >