5-19 While the plane can hold 70 passengers, no airline operates routinely at 100% capacity. Suppose that the average number of passengers per plane is 60. Fill in the table to determine annual profitability: 60 Average plane carrying 60 passengers Vol (passengers) ble Difference Contribution Diff X Contribution = profit/flight Profit/week (5 flights a week) Profit/year (52 weeks/year) Tri-States Airways problem should convince you of the utility of the vol ble model for those situations that can be analyzed by the ble methodology. 5-19 While the plane can hold 70 passengers, no airline operates routinely at 100% capacity. Suppose that the average number of passengers per plane is 60. Fill in the table to determine annual profitability: 60 Average plane carrying 60 passengers Vol (passengers) ble Difference Contribution Diff X Contribution = profit/flight Profit/week (5 flights a week) Profit/year (52 weeks/year) Tri-States Airways problem should convince you of the utility of the vol ble model for those situations that can be analyzed by the ble methodology