Answer: $36,000 increase.
Explanation:
Cost of keeping Current Truck.
The cost of keeping the current truck will be the Opportunity Cost of not purchasing the New truck.
The New truck is capable of reducing Manufacturing costs by $25,000 a year for 5 years so,
Cost of Keeping Current Truck = 25,000 * 5
= $125,000
Cost of buying new truck
It is given that if the company trades in the old truck they get a $31,000 reduction.
The Cost Price of the new truck is therefore,
= 120,000 - 31,000
= $89,000
The difference between the costs will be,
= 125,000 - 89,000
= $36,000
If buying a new truck will reduce expenses by $36,000 then that means it will increase income by $36,000.