Oil prices sank Monday, according to AP. Brent crude, a benchmark for international oils, was down $2.53 at $108.52 a barrel at midafternoon Bangkok time in electronic trading on the ICE futures exchange in London. Benchmark U.S. crude fell $1.54 to $93.30 on the New York Mercantile Exchange. Benchmark U.S. crude is down from about $110 in October because of ample supplies and muted demand.