If I have a problem that provides initial investment amount, the expected life of the project, and the forecasted sales per year, with the fixed costs and variable cost per unit but there are no units, and how much each item cost but still no units indicated, and you are given straight line depreciation and salvage value and it references wacc but no interest rate, rate of return or discounted rate of return and you must find the POV of future returns and np , how do I set up a problem like this?