The manufacturer of a single type of calculator has supplied the following data for the year just ended: Number of calculators produced and sold 62,500 Sales revenue 312,500 78,125 102,800 Variable production costs Fixed production costs Variable selling and administrative expenses Fixed selling and administrative expenses Net profit 9,375 23,850 98,350 QUESTION 5 What is the contribution margin ratio earned by the manufacturer to 1 decimal place? A) 72.0% B) 31.5% C) 28.0% D) 69.5%