Answer:
payback 2.5 years
Step-by-step explanation:
the payback will be the point in time at which the project cash flow equal the invesmtent.
This method do not consider the time value of money so we don't have to adjust any period cashflow or outflow.
investment: 5,000
increase in cash-flow 2,000
Investment/cash flow = 5,000 / 2,000 = 2.5 years
The depreciation are not considered as this are not cash flow.