Current Attempt in Progress The controller of Rather Production has collected the following monthly expense data for analyzing the cost behavior of electricity costs. (a) Determine the fixed-and variable-cost components using the high-low method. What electricity cost does the cost equation estimate for a level of activity of 500 machine hours? Electricity costs $ By what amount does this differ from March's observed cost for 500 machine hours? Amount differ $ eTextbook and Media Attempts What electricity cost does the cost equation estimate for a level of activity of 700 machine hours? Electricity costs $ By what amount does this differ from June's observed cost for 700 machine hours