This question context is from the textbook Engineering Economic Analysis

A water efficient dishwasher is being considered for the cafeteria. The efficient system costs $3,000 more than the other model but is expected to save $1,200 per year more in water expense. Select from below the payback period (in years) for this project.SHOW YOUR WORK/REASONING

A - 3.5

B - 3.0

C - 2.5

D - 4.0