Answer:
weighted contribution margin ratio = 0.545
Step-by-step explanation:
contribution margin of sport shoes = $110 - $50 = $60
contribution margin ratio of sport shoes = $60 / $110 = 0.545454
contribution margin of formal shoes = $220 - $100 = $120
contribution margin ratio of sport shoes = $120 / $220 = 0.545454
35% of total revenues come from sport shoes
weighted contribution margin ratio (it is the same for both products) = 0.545454 = 0.545