*Actual costs may vary. Estimated costs for natural gas, electricity, and oil prices are based on an average rate from February 2011 and January 2012. Natural gas prices are based on Enbridge Gas Distribution Inc.’s residential rates. Oil prices are based on retail prices for the Toronto region. Electricity rates based on Toronto Hydro rates. Costs have been calculated for the equivalent energy consumed and include all service, delivery and energy charges. Taxes not included.