Answer :
Option (D): Decrease of $2,700
Explanation :
As per the data given in the question,
1) Net operating income without change:
1. Sales (2,000 units × $180) $360,000
2. Less: Variable expenses (2,000 units × $90) $180,000
3. Contribution ($36,000 - $180,000) $180,000
4. Less: Fixed cost $131,000
5. Net operating income ($180,000 - $131,000) $49,000
2) Net operating income with change:
1. Net operating income without change $49,000
2. Less: Advertising expenses to increase in sale $18,000
3. Add: Sales value for extra 170 units (170 × $180) $30,600
4. Less: Variable expenses for 170 units (170 × $90) $15,300
5. Net operating income after change $46,300
($49,000-$18,000+$30,600-$15,300)
From the above tables we can conclude, there is decrease of $2,700 which is not advisable.