The controler of Crane Production has collected the following monthly expence data for analyzing the cast betawie of electricy cost Total Electricity Costs Machine Hours January Total February March April 2010 3.500 220 370 460 3.240 50 June July 550 600 September October November Dec 5.10 300 310 370 10 Determine them and variable-cost coming the bathod Variable-costs What electricity cost does the cost equation estimate for a level of activity of 460 machine hours? Electricity costs By what amount does this differ from Starch's observed cont for 460 machine hours? Amount differ she What electricity cont does the cost equation estimate for a level of activity of Zpo machine hours? Electricity costs By what amount does this from unes observed cost for 790 machine hours? Amount differ