We have the opportunity to purchase a pizza delivery van for $10,000. At the end of its useful life of 4 years, we can turn in the van for trade in of $2000. The van will increase net revenues by $3500 each of the next 4 years. What is the net cash and discounted cash flow provided in year 4 . Assume 8% interest rate in the NPV model. 3500:25733500:.73505500:.79385500:4043