Crude oil prices slipped in early trading Monday on the New York Mercantile Exchange, opening at $96.10, off $1.63. Henry Hub natural gas opened at $4.231 per million British thermal units, up 0.078 cents. Home heating oil was down 0.0369 cents, opening at $3.0959 per gallon. Gasoline was off 0.0350 cents, starting the day's trading at $3.0958 a gallon. At the pump, the average price for a gallon of regular unleaded gasoline Monday was $3.631, compared to Friday's $3.594, AAA reported.