Answer:
not profitable
payback period > project life
Step-by-step explanation:
to determinatethe payback we will divide the investment amount over the cashflow per year generated for the project:

1,860,000 / 310,000 = 6 years
As the cash flow are generated per year this give us how many years the project needs to continue to payback the investment. If we use a monthly income the answer will be expressed in month.
Because, the project life is 5 years and payback occurs at 6 years the project is not profitable. The company do not recover his initial investment.