Help Sove & Exit London Inc. has identified the following costs at different activity levels for electricity for their manufacturing plant; Units Produced Electricity Cost 1,000 2,000 3,000 4,000 5,000 $50,000 $97,400 $148,000 $192,500 $242,000 Management is uncertain on how to predict costs at different activity levels and thus has asked for some assistance. State the equation of electricity cost that management can use to estimate future electricity costs.