Delta Dawn's Bakery is considering purchasing a new van to deliver the bread. The van will cost $21,500. Two-thirds of this cost will be borrowed. The loan is to be repaid with four equal annual payments based on an interest rate of 4%/year. It is anticipated that the van will be used for 6 years and then sold for a salvage value of $3,000. The annual operating and the maintenance expenses for the van over six-year life are calculated to be $700 per year. If the van is purchased, Delta will realize a cost savings of $3,200 per year. Delta uses a MARR of 6%/year. Determine the present worth of the van?