(5) Find the cost per hour of the sandblaster in the first year as detailed below. The price of the car is 2 million baht. 300 horse power The tire costs 10% of the vehicle cost and has a lifespan of 5000 hours. Service life 5 years, 2000 hours each. The final value (Salvage Value) 20 % of the purchase price of the car. Depreciation is calculated using the Double Declining Balance Method. 10% interest per annum Tax fee, insurance fee, storage fee 8% per year Normal conditions of use Petrol price 50 baht/gallon Driver's wage 400 baht/day Total repair cost for 5 years, 80% of the cost of the car