Explanation:
The cash flows after discounted is
Years Annual cash flows Discount factor @15% Present value
0 $14,500 1 $14,500 (A)
1 $4,600.00 0.8695652174 $4,000.00
2 $6,100.00 0.7561436673 $4,612.48
3 $8,500.00 0.6575162324 $5,588.89
Total present value $14,201.36 (B)
Net present value -$298.64 (A - B)
Since net present value is negative, so we cannot determined the discounted pay back period