Fill in the missing amounts for (a) and (b) in the following graph. Flexible budget line Flexible budget - $ 90,000 Operating profit Master budget $ 32,000 $0 Units sold Operaing loss Master budget activity - 2,000 units Flexible budget activity = (b) Fixed costs = $ 200,000 Slope = Contribution margin per unit - (a) per unit (a) Contribution margin (b) Flexible budget activity units