Answer:
Project b
Explanation:
The cash payback period calculates how long the amount invested in a project would be recouped from its cummulative cash flows.
Project b should be taken because the amount invested would be recouped in 1.8 years which is less than the 2 years benchmark.
The amount invested in project A would be gotten back in 2.3 years which is greater than the 2 years benchmark. This makes project A unacceptable.
Please find explanations on how this answer was derived in the attached images.
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