Answer: Never
Step-by-step explanation:
Discounted payback period aims to find out how long it will take for a project to repay its investment given its discounted cashflows.
Year 1 = 7,200 / ( 1 + 0.16)
= $6,206.8965
= $6,206.90
Year 2 = 8,900 / ( 1 + 0.16) ²
= $6,614.149
= 6,614.15
Year 3 = 7,500 / ( 1 + 0.16)³
= $4,804.93
Year 1 + Year 2 + Year 3
= 6,206.90 + 6,614.15 + 4,804.93
= $17,625.98
It failed to pay back the $17,700