ANSWER:
Unit Cost = $40
Unit Contribution Margin = 252000/12600 = $20
Unit Variable Expenses = 252000/12600 = $20
Part 1:
CM ratio = 504000/252000 = 50%
For Break Even Quantity (BEQ) , profit = 0
Profit = (Unit CM * BEQ) - Fixed Expenses
0 = (20 * BEQ) - 282000
BEQ = 282000/20
BEQ = 14100 units
Break Even Sales (BES) will then be,
BES = Quantity * Unit Cost
BES = 14100 * 40
BES = $564000
Part 2:
Using incremental contribution margin approach:
Increased Sales * CM ratio = 85000 * 50% = $42500
Increased Advertising Cost = $6600
Increase in monthly net operating income = 42500 - 6600 = $35900
Hence, net profit will be
Profit = 35900 - 30000
Profit = $5900
Part 3:
New unit cost = 40 - (40 * 10%) = $36
New number of units = 2 * 12600 = 25200 units
New Sales = 36 * 25200 = $907200
New Variable Expenses = 20 * 25200 = $504000
New Contribution Margin = 907000 - 504000 = $403000
New Fixed Expenses = 282000 + 33000 = $315000
Net Operating Income
= New Sales -(New Variable Expenses + New Fixed Expenses)
Net Operating Income = 907000 - (504000 + 315000)
Net Operating Income = $88000