Wheat:  Net sales of 452,300 metric tons for 2019/2020 were down 17 percent from the previous week and 6 percent from the prior 4-week average.  Corn:  Net sales of 1,471,200 MT for 2019/2020 were up 91 percent from the previous week and 53 percent from the prior 4-week average.  Soybeans:  Net sales of 302,800 MT for 2019/2020--a marketing-year low--were down 12 percent from the previous week and 34 percent from the prior 4-week average.   Soybean Cake and Meal:    Net sales of 171,800 MT for 2019/2020 were down 46 percent from the previous week and 22 percent from the prior 4-week average.  Soybean Oil:  Net sales of 24,700 MT for 2019/2020 primarily for Morocco (20,000 MT switche...