ARCO &lt;ARC> RAISES CRUDE OIL POSTINGS 50 CTS
  Atlantic Richfield's Arco Oil and Gas Co
  said it increased contract prices for crude oil by 50 cts a
  barrel, effective today.
      Arco said the 50 cts increase brings its posted price for
  West Texas Intermediate, the U.S. benchmark grade, to 19.00
  dlrs a barrel.
      The price of West Texas Sour was increased to 18.10 dlrs.
  Light Louisiana Sweet was raised to 19.35 dlrs.
      The price was last changed on September 30.
  

