2. A company has a set of personal computers that in total cost $18,000 to purchase and collectively have an annual maintenance cost of $900. After 3 years the salvage value of this set of computers is $3,000. If the company uses an internal discount (interest) rate of 8%, what is the equivalent uniform annual cost? a. $6,960 b. $6,922 c. $7,288 d. $7,499