NEED HELP!!

Gamma Electronics is considering the purchase of testing equipment that will cost $335 000 to replace old equipment. Assume the new machine will generate after-tax savings of $105 000 per year over the next five years. What is the payback period for this investment? Select one: a. 2.80 years b. 1.8 years c. 2.0 years d. 3.19 years