An agricultural accounting firm needs a new copy machine

An agricultural accounting firm needs a new copy machine. If it leases the copier on a five-year lease, five rental payments of $900 will be made at the end of the year, including the first. Alternatively, the firm could purchase the copier. If purchased, an initial investment of $500 would be required. Amortized loan payments of $500 would then be made at the end of years 1-5. The copier would have no salvage value at the end of five years. $2200 in cash inflow each year would be attributed to the copier. The cost of capital is 9%. Would it be better for the accounting firm to purchase or lease the copier? Why? 

a. Buy because NPV_buy of $6112 is greater than NPV_lease of $5057

b. Lease because NPV_lease of $6112 is greater than  NPV_buy of $5057

c. The accounting firm is indifferent since  NPV_buy =  NPV_lease

d. There is not enough information to answer this question