3. CHAPTER 3 = Assume the Total Benefit and Total Cost for your product are represented by the functions below. TB = 170A - A TC = 100 - 10A + 2A In Excel, produce a chart that shows both functions with 50 data points (i.e. A=1...50). You decide what is A in your case (i.e. number of workers, hours of labor, etc. This is important because is going to determine your costs and profit). Estimate Marginal Benefit by taking the first derivative of Total Benefit (TB). Estimate Marginal Cost by taking the first derivative of Total Cost (TC)