Answer:
Method B should be used
Explanation:
Note: See the attached excel file for the calculation of the present worth of Method A and Method B.
From the attached excel file, we have:
Present worth of Method A = –$210,889.85
Present worth of Method B = –$118,011.18
Since the present worth of Method A and B above imply Method A costs more than Method B, Method B should be used.