A wafer cutting and manufacturing enterprise needs to expand its production capacity to meet market demand. The current industrial solid waste treatment facility of the enterprise can be expanded to meet demand, with an expansion cost of 1.35 million US dollars. The waste treatment cost for the expansion facility is approximately $284000 per year. If a company chooses to abandon expansion and build a brand new industrial solid waste treatment facility, it can reduce waste production, but building a brand new waste treatment facility requires approximately $3.5 million. The estimated annual cost of industrial solid waste treatment for the new facility is $66000. Assuming the service life of both the expansion and new facilities is 20 years, and the residual values of both are zero. If the current interest rate is 10%, which option is more advisable? In order to promote carbon neutrality as soon as possible, the BJ local government has announced a 10-year BOT bidding project for a 2.5 megawatt solar power plant. The BOT tender specifies that the operation period of the project is limited to 10 years, and the electricity procurement price is S$0.13 per kilowatt hour ($0.13/kWh). The peak sunshine hours of the project per year are 1500 hours. The cost of solar panels is S$800000 per megawatt, and the maintenance cost of solar panels is $0.008/kWh. The reduction in solar cell production capacity within 10 years is negligible. The civil engineering cost is S$330000, and the installation cost is S$65000 per megawatt. Please answer the following question: Calculate the total investment in the overall equipment and construction of the solar power plant? And how many kilowatt hours of energy can be generated annually? Assuming energy sales of $0.15/kWh, how many years will it take for the solar power plant to reach breakeven? Assuming that the bank is willing to loan S \$1.5 million to NPCA New Energy Company, which can repay the principal and 4% simple interest per year within five years, and achieve breakeven within five years, how can NPCA New Energy Company enhance its competitive advantage in terms of kWh selling price