solve with excel only (share formulas): The financial managers of Winsor corporation are deciding whether to upgrade a plant. If there is no upgrade, the existing plant is going to deliver annual cashflows of $10,000 for the next 10 years and will then be dismantled in year 11 for a recycling cost of $25,000. If upgraded, the upgrading process would cost today $60,000, and the plant will then produce annual cashflows of $12,000 for 15 years (from year 1 to year 15). In year 16, the plant could either be dismantled for a recycling cost of $9,000 or stay idle (i.e., generating no cashflows) for another year and then be dismantled in year 17 for a cost of $5,000. Once dismantled, the plant cannot be used for any production forever. The required rate of return for both the existing plant and the upgraded plant is 9% per year. Assume no tax. Should the managers upgrade the plant? What is the NPV of the upgrade?