Answer:
It is a good investment, the company should purchase the machine and sale the old one.
Step-by-step explanation:
![\right[\begin{array}{cccc}-&old&new&differential\\purchase&0&-112,500&-112,500\\proceed \:from \:sale&0&60,000&60,000\\cost \:savings&0&13,000&13,000\\total \:cost \:saving&0&65,000&65,000\\Net&0&78,000&12,500\\\end{array}\right]](https://img.qammunity.org/2020/formulas/business/college/y8qtv8iaupp3kzrnaa8wp3e1njf2k9y5fm.png)
We post the purchase cost and the proceeds from the machine sale,
The book value of the machine is irrelevant, we are looking to save cash. The old machine value is a sunk cost. It is a cost already incurred. We don't use it in the calculations.
Then we calculate the saving for five years.
Last, we add the differential analysis column.
Because is gives a positive amount, purchase the new machien would be a good idea.