Please explain how to obtain the above answers.

35. A piece of equipment costs $24 000. It is expected to generate $7500 of annual cash revenues and $1500 of annual cash expenses. The disposal value at the end of the estimated 10-year life is $2000. What is the payback period? A. 3.20 years B. 6.67 years C. 3.67 years D. 4.00 years