(e) Cost of sales for the three months ended March 31, 2011 includes a loss of $542 million ($352 million after tax) on derivative contracts related to the forward sales of refined product. These contracts were closed and realized during the first quarter of 2011. The $542 million loss is reflected in refining segment operating income, resulting in a $2.86 reduction in refining throughput margin per barrel for the three months ended March 31, 2011, and is allocated to refining operating income (loss) by region, excluding Northeast, based on relative throughput volumes for each region as follows: Gulf Coast- $372 million, or $3.18 per barrel; Mid-Continent- $122 million, or $3.36 per barrel; and West Coast- $48 million, or $2.71 per barrel.
(f) General and administrative expenses for the three months ended March 31, 2010 includes the recognition of a favorable settlement with one of Valero's third-party insurers for $40 million. The settlement relates to Valero's claim of insurance coverage in connection with losses incurred in prior periods.
(g) Common equivalent shares have been excluded from the computation of diluted loss per common share for the three months ended March 31, 2010 as the effect of including such shares would be antidilutive.
(h) Primarily includes petrochemicals, gas oils, No. 6 fuel oil, petroleum coke, and asphalt.(i) The regions reflected herein contain the following refineries: Gulf Coast- Corpus Christi East, Corpus Christi West, Texas City, Houston, Three Rivers, St. Charles, Aruba, and Port Arthur Refineries; Mid-Continent- McKee, Ardmore, and Memphis Refineries; Northeast- Quebec City; and West Coast- Benicia and Wilmington Refineries. (j) Average market reference prices for Louisiana Light Sweet (LLS) crude oil, along with price differentials between the price of LLS crude oil and other types of crude oil, have been included in the table of Average Market Reference Prices and Differentials. The table also includes price differentials by region between the prices of certain products and the benchmark crude oil that provides the best indicator of product margins for each region. Prior to the first quarter of 2011, feedstock and product differentials presented herein were based on the price of West Texas Intermediate (WTI) crude oil. However, the price of WTI crude oil no longer provides a reasonable benchmark price of crude oil for all regions. Beginning in late 2010, WTI light-sweet crude oil began to price at a discount to waterborne light-sweet crude oils, such as LLS and Brent, because of increased WTI supplies resulting from greater domestic production and increased deliveries of crude oil from Canada into the Mid-Continent region. Therefore, the use of the price of WTI crude oil as a benchmark price for regions that do not process WTI crude oil is no longer reasonable.