1- find the min EUEC of challenger

2- the marginal cost of keeping defender one more year

you can look up 20% rate in google if needed.

A high-speed electronic assembly machine was purchased two years ago for $50,000. At the present time, it can be sold for $27,000 and replaced by a newer model having a purchase price of $38,500;or t can be kept in service for a maximum of one more year. The new assembly machine, purchased has a useful life o not more than two years f the before-tax MARR s 20%, when should the old assembly machine be replaced? Use the following data table for your analysis. Challenger Defender Market Value O&M Costs Year Market Value O&M Costs $38,500 30,000 2 27,000 $11,000 13,500 27,000 17,000 $15,000 Click the icon to view the interest and annuity table for discrete compounding when the MARR s 20% per year