(12) 10. A pump is needed for twenty years at a remote location. The pump can be driven by an electric motor if a power line is extended to the site. Otherwise, a gasoline engine will be used. Your preferred interest rate is 10%, Data First Cost Annual Operating Cost Annual Maintenance Salvage Value Service Life (years) Gasoline $2,400 $1,200 $300 $300 Electric S6,000 $750 $50 $600 10