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Linear Gradient 1.- A textile mill has just purchased a lift truck that has a useful life of 10 years. The engineer estimates that the maintenance cost for the truck during the first year will be $2,000, maintenance cost are expected to increase as the truck ages at a rate of $200 per year over the remaining lire. Assume that the maintenance cost occur at the end of each year. The firm wants to set up a maintenance account that earns a 12% annually. All Maintenance expenses have to be paid out from this account. How much does the firm have to deposit in the account now