Wheat:  Net sales of 446,400 metric tons (MT) for 2020/2021 were down 44 percent from the previous week and 5 percent from the prior 4-week average.   Corn:   Net sales of 1,371,400 MT for 2020/2021 were down 18 percent from the previous week and 14 percent from the prior 4-week average.  Soybeans:   Net sales of 406,900 MT for 2020/2021--a marketing-year low--were down 47 percent from the previous week and 68 percent from the prior 4-week average.  Soybean Cake and Meal:  Net sales of 163,800 MT for 2020/2021, resulting in increases primarily for Mexico (56,100 MT), Bangladesh (45,000 MT), the Philippines (45,000 MT), Ecuador (36,400 MT, including 30,000 MT switched from unknown destinat...