Answer:
Effect on income= $0
Step-by-step explanation:
Giving the following information:
He is currently grooming 120 dogs per week. If instead of grooming 120 dogs, he grooms 121 dogs, he will add $65.65 to his costs and $65.65 to his revenues.
Contribution margin per dog= selling price - unitary variable cost
Contribution margin per dog= 65.65 - 65.65= 0
Effect on income= 0*1= $0