A Fuel Surcharge is applied to the shipping cost to isolate the cost of fuel and ensure pricing is reflective of current market conditions.  Surcharges are applied based on the method of transportation used.    
Rates for rail shipments are published in tariff 9900 by Canadian Pacific Railway.    

Truck and barge rates are based on the average weekly cost of diesel and other sources of energy, as published by the Freight Carriers Association of Canada and other related periodic publications.