Question 6: Calculate the ownership cost per hour for an excavator p based on the following data -Purchase price (P) = $420,000 Salvage value (F) = $250,000 Operation factor-50% Useful life (N) 6 years Working hours per year 2000 . Maintenance and repair costs-110% of annual depreciation -Diesel fuel price 3 8/gallon " Fuel consumption = 0.04 gallon/hp/hr Lube oil cost = 10% of fuel- Interest rate () = 10%