The other trolley options are hybrid at $$510,000$ with $$32,500$

expenses and flex$-$fuel at $$425,000$ with $$53,000.$ The expectation remains at a $10-$year service and flex losing value at $20\%$ yet hybrid at only $15\%.$ What is your recommendation? Include the PW$,$AW$,$ROR,IRR and the alternatives$($ first cost, annual benefits, annual costs, salvage value and useful life$)$