Answer:
B) increase of $2,520
Step-by-step explanation:
Calculation for What should be the overall effect on the company's monthly net operating income of this change
Using this formula
Increase (Decrease) in net operating income= Additional contribution margin from increased sales - Advertising cost
Let plug in the formula
Increase (Decrease) in net operating income= (170*$56)- $7,000
Increase (Decrease) in net operating income= $9,520 - $7,000
Increase (Decrease) in net operating income= increase of $2,520
Therefore What should be the overall effect on the company's monthly net operating income of this change is increase of $2,520