A new production system for a factory is to be purchased and installed for $142138. This system will save approximately 300,000kWh of electric power each year for a 6-year period. Assume the cost of electricity is $0.10 per kWh, and factory MARR is 15% per year, and the salvage value of the system will be $9403 at year 6. Using the PW method to analyzes if this investment is economically justified A- calculate the PW of the above investment and insert the result below