What is the solution for this problem in the engineering economy 16th edition

its market value at EOY four is $300, complete Table P5-24 below [values (a) through (f)], using an opportunity cost of 5% per year. Compute the equivalent uniform CR amount, using information from the completed table. A simple, direct space heating system is currently being used in a professional medical office complex. An upgraded "variable air-volume system" retrofit can be purchased and installed for $200,000 (investment cost). Its power savings in the future will be 500,000 kilo-Watt hours per year over its estimated life of 8 years. The cost of electricity is $0.10 per kilo-Watt hour. If the firm's cost of capital is 12% per year and the residual value of the system in 8 years is $20,000, should the new system be purchased? Use the present worth method