4.1) The initial cost of a pickup truck is $12658 and will have a salvage value of $4488 after five years. Maintenance is estimated to be a uniform gradient amount of $143 per year, with zero dollar for first year maintenance. The operation cost is estimated to be $0.38 per mile for 164 miles per month. If the interest rate is 12%, what is the annual equivalent cost (AEC) for the truck?