Yet it would take many hundreds of cargo flights each day to provide the 12,000 tons of food, fuel, clothing and medicine it was estimated was necessary to sustain the two million people of western Berlin. There were simply not enough C-47s available, as it was estimated that over 900 would be needed to fly the necessary tonnage to Berlin each day. However, if the larger C-54 Skymaster was used, about 180 could supply the cargo necessary.