Wheat:  Net sales of 192,400 metric tons (MT) for 2020/2021--a marketing-year low--were down 36 percent from the previous week and 62 percent from the prior 4-week average.  Corn:  Net sales of 1,088,600 MT for 2020/2021 were up 11 percent from the previous week, but down 43 percent from the prior 4-week average.    Soybeans:  Net sales of 1,387,700 MT for 2020/2021--a marketing-year low--were down 6 percent from the previous week and 18 percent from the prior 4-week average. Soybean Cake and Meal:  Net sales of 182,100 MT for 2020/2021, resulting in increases primarily for Mexico (63,100 MT, including decreases of 4,200 MT), Venezuela (33,700 MT, late – see below), Ecuador (27,800 MT, includ...