A John Deere tractor, model 3405 was purchased at the price of RM80, 000.00. It is estimated that the economic life of the tractor is 10 years and the salvage value is 10% of the purchased price. Calculate a year to year depreciation using these three methods: a. Sum-of-digits depreciation b. Declining-balance depreciation c. Straight-line depreciation Then, estimate the annual fuel consumption for a 125 PTO Hp diesel tractor that will be used for 850 hr per year