Crude oil prices dropped $1 to $104.49 per barrel Friday morning. On the New York Mercantile Exchange, reformulated blendstock gasoline was unchanged at $2.9855 per gallon. Home heating oil dropped 2.09 cents to $3.019 per gallon. Natural gas dropped 2.3 cents to $3.621 per million British thermal units. At the pump, the national average price for a gallon of unleaded regular gasoline was $3.648 Friday, down from Thursday\'s $3.655, the AAA Fuel Gauge report said.