please help ASAP

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 $41,000; or it can be kept in service for a maximum of one more year. The new assembly machine, if purchased, has a useful life of not more than two years. If the before-tax MARR is 15%, when should the old assembly machine be replaced? Use the following data table for your analysis. Challenger Defender Year Market Value O&M Costs Market Value O&M Costs $41,000 $27,000 - 0 32,000 $9,500 16,500 $14,000 N 27,000 14,000 Click the icon to view the interest and annuity table for discrete compounding when the MARR is 15% per year. The minimum EUAC value of the challenger is $ . (Round to the nearest dollar.) The marginal cost of keeping the defender in service for one more year is $ . (Round to the nearest dollar.) The old assembly machine should be replaced immediately i More Info - X Discrete Compounding; i = 15% Single Payment Uniform Series Compound Compound Sinking Capital Amount Present Amount Present Fund Recovery Factor Worth Factor Factor Worth Factor Factor Factor To Find F To Find P To Find F To Find P To Find A To Find A Given P Given F Given A Given A Given F Given P N FIP P/F FIA PIA A/F AIP 1. 1500 0.8696 1.0000 0.8696 1.0000 1. 1500 1.3225 0.7561 2. 1500 1.6257 0.4651 0.6151 UI AWN - 1.5209 0.6575 3.4725 2.2832 0.2880 0.4380 1.7490 0.5718 4.9934 2.8550 0.2003 0.3503 2.0114 0.4972 6.7424 3.3522 0. 1483 0.2983