Wheat:  Net sales of 275,300 metric tons (MT) for 2020/2021 were down 47 percent from the previous week and from the prior 4-week average.   Corn:  Net sales of 748,900 MT for 2020/2021 were down 22 percent from the previous week and 39 percent from the prior 4-week average.   Soybeans:  Net sales of 37,000 MT for 2020/2021--a marketing-year low--were down 95 percent from the previous week and 94 percent from the prior 4-week average.  Soybean Cake and Meal:  Net sales of 124,100 MT for 2020/2021 were up 63 percent from the previous week, but down 32 percent from the prior 4-week average.  Soybean Oil:  Net sales of 3,500 MT for 2020/2021 primarily for Mexico (1,800 MT), Haiti (1,50...