General Comments Overnight trade in grains and the soy complex opened slightly lower, and then slightly edged above the previous closes. Volume was light. By the time the day session opened, traders had a chance to look at last week's export sales volumes. Sales of wheat and corn fell well below expectations, and this put a cap on prices throughout the day session's choppy price action. Soybean sales also fell below expectations, but the large volume of meal and soyoil sales made up for that. Traders knew that product sales would be big, but even so, the numbers looked pretty impressive.The preliminary estimate of the U.S. GDP for the third quarter showed that the economy grew 2.7 percent. This was the biggest jump since the fourth quart...