This is for an engineering economy class, your help is much appreciated!

A retrofitted space-heating system is being considered for a small office building. The system can be purchased and installed for $126,000, and it will save an estimated 250,000 kilowatt-hours (kWh) of electric power each year over a seven-year period. A kilowatt-hour of electricity costs $0.09, and the company uses a MARR of 14% per year in its economic evaluations of refurbished systems. The market value of the system will be $8,000 at the end of seven years, and additional annual operating and maintenance expenses are negligible. Use the benefit-cost method to make a recommendation. Click the icon to view the interest and annuity table for discrete compounding when the MARR is 14% per year. The benefit-cost ratio of the system with PW is (Round to two decimal places.) N 1 Discrete Compounding; i = 14% Single Payment Uniform Series Compound Compound Sinking Amount Present Amount Present Fund Factor Worth Factor Factor Worth Factor Factor To Find F To Find P To Find F To Find P To Find A Given P Given F Given A Given A Given F FIP PIF FIA PIA AF 1.1400 0.8772 1.0000 0.8772 1.0000 1.2996 0.7695 2.1400 1.6467 0.4673 1.4815 0.6750 3.4396 2.3216 0.2907 1.6890 0.5921 4.9211 2.9137 0.2032 1.9254 0.5194 6.6101 3.4331 0.1513 2.1950 0.4556 8.5355 3.8887 0.1172 2.5023 0.3996 10.7305 4.2883 0.0932 2.8526 0.3506 13.2328 4.6389 0.0756 3.2519 0.3075 16.0853 4.9464 0.0622 3.7072 0.2697 19.3373 5.2161 0.0517 Capital Recovery Factor To Find A Given P AIP 1.1400 0.6073 0.4307 0.3432 0.2913 0.2572 0.2332 0.2156 0.2022 0.1917 4 5 6 7 8 9 10