A small accounting firm is considering the purchase of a computer software package that would greatly reduce the amount of time needed to prepare tax forms. The software costs $1750 and this expense will be incurred immediately. The firm estimates that it will save $675 of cash flow at the end of each year beginning in one year for 5 consecutive years, and also save $1856 in year 6. What is the payback on the computer package? Answer: ? Years