Wheat:   Net sales of 72,900 metric tons for 2019/2020--a marketing-year low--were down 90 percent from the previous week and 86 percent from the prior 4-week average.    Corn:   Net sales of 1,075,400 MT for 2019/2020 were down 41 percent from the previous week and 13 percent from the prior 4-week average.  Soybeans:   Net sales of 957,400 MT for 2019/2020 were up 6 percent from the previous week and 75 percent from the prior 4-week average.    Soybean Cake and Meal:   Net sales of 125,200 MT for 2019/2020 were down 50 percent from the previous week and 39 percent from the prior 4-week average  Soybean Oil:    Net sales of 67,000 MT for 2019/2020-...