Arthur operates a part-time auto repair service. He estimates that a new diagnostic computer system will result in increased cash inflows of $2,100 in Year 1, $3,200 in Year 2, and $4,000 in Year 3. If Arthur's discount rate is 10%, then the most he would be willing to pay for the new computer system would be:
A. $6,652
B. $6,984
C. $7,747
D. $7,556