We have the following data for a power plant:

1 MW CENTRAL ECONOMIC BALANCE

Power: 1 Mwa

Maintenance cost: 3% per year

The initial cost of operation: 5% per year

Regulated Rate: $0.015/kWh (20 years)

Project cost = $750,000.00

Plant factor= 60%

Energy: 5256000 KWh

Income from regulated tariff: 78840

Annual revenue increase: 6%

Initial maintenance cost/year of annual maintenance (2% installation): $ 22,500.00

Annual maintenance increase: 5%

Initial cost of operation/year (1% Installation) $ 37,500.00

Annual operation increase: 3%

It is assumed that in year 10, an equipment update will be carried out whose cost will be 25% of the value of the investment = $187,500.00

SOLVE: 

Find the IRR for 10 years.