Export Sales for Dec 3-9, 2021. Wheat:  Net sales of 650,600 metric tons (MT) for 2021/2022--a marketing-year high--were up noticeably from the previous week and from the prior 4-week average.   Corn:  Net sales of 1,948,700 MT for 2021/2022--a marketing-year high--were up 72 percent from the previous week and 74 percent from the prior 4-week average.  Soybeans:  Net sales of 1,308,600 MT for 2021/2022 were down 20 percent from the previous week and 6 percent from the prior 4-week average.  Soybean Cake and Meal:  Net sales of 95,600 MT for 2021/2022--a marketing-year low--were down 53 percent from the previous week and 43 percent from the prior 4-week average.  Soybean Oil:  Net sales...