Answer:
D) Increase by $68,000
Explanation:
The computation of change in the operating income is shown below:
Sales ( 8,100 widgets × $39) $315,900
Less: Variable cost (8,100 widgets × $29) ($234,900)
Contribution margin $81,000
Less: Increase in fixed assets -$13,000
Net income increased $68,000
We simply applying the above format so that the change in the operating income could be find out. Since the net income is in positive so it shows an increment