Determine the fixed costs and unit variable coats using the high-low mathod. Tatal fixad coats $ Variable cest per machine hour $ eTextbook and Medla (b) Your answer is incorrect. What alectricity cost does the cost equation estimate for a level of activity of 500 machine hours? Electricity cost $ Bywhat amount does this differ from March's obsarved cost for 500 machine hours? Amount differ $ eTextbook and Medla