Suppose you expect to buy the 3D printer in the previous question and it will last 3 years. You are likely to earn $300 each year for your maker shop from the year 1 to year 3. However,you expect to spend $20 each year for the operating and maintenance. At the end of year 3, you expect to sell this printer for $50. If your MARR is 8% per year. What is the closest number to the NPV of this project? What is your engineering economic decision in problem 4? What is the capital recovery in question 4?

Suppose you expect to buy the 3D printer in the previous question and it will last 3 years. You are likely to earn $300 each year for your maker shop from the year 1 to year 3. However, you expect to spend $20 each year for the operating and maintenance. At the end of year 3, you expect to sell this printer for $50. If your MARR is 8% per year. What is the closest number to the NPV of this project? Pick a choice: $ 90 $ 19.40 0 -$ 38.7 What is your engineering economic decision in problem 4? Pick a choice: Buy the 3D printer Do not buy the 3D printer I have no idea how to answer this question. What is the capital recovery in question 4? Pick a choice: -$295 -$300 -$310