Question: this is for engineering economics class we use the excel...
This is for engineering economics class. We use the excel software. Below is exercise 5, and I really need help with it. Below that is my work on excel. I got part a correct for the answer matches the professor; however, my equation could be wrong. My equation shows in the picture but I also wrote it down on the paper too. A good thing for me to clarify is that the only things that I used an equation for thus far was the cost at times 13 through 16, everything else is hardcoded in.
Please help and include all formulas, thank you very very much!