Kaneb Is Evaluating Two Alternative Pipeline Welders

Kaneb is evaluating two alternative pipeline welders.Welder A costs $310,000, has a 7 year life, and is expected to generate net cash inflows of $78,000 in each of the 7 years.Welder B costs $320,000, has a 5 year life, and is expected to generate annual net cash inflows of $68,900 in each of the 5 years.Kaneb's cost of capital is 16%.Using the equivalent annual annuity method, which alternative should be chosen and what is its NPV?

A) B, $4,920
B) A, $7,111
C) B, $10,650
D) A, $7,800