Answer:
1. Particulars Amount
Sales total (7,150 * $35) $250,250
Less: Variable expenses (7,150 * $19) $135,850
Contribution margin $114,400
Less: Fixed expenses $55,800
Net operating income $ 58,600
2. Particulars Amount
Sales total (7,050 * $35) $246,750
Less: Variable expenses (7,050 * $19) $133,950
Contribution margin $112,800
Less: Fixed expenses $55,800
Net operating income $ 57,000
3. Particulars Amount
Sales total (6,100* $35) $213,500
Less: Variable expenses (6,100 * $19) $115,900
Contribution margin $97,600
Less: Fixed expenses $55,800
Net operating income $ 41,800