Wheat:  Net sales of 178,300 metric tons for 2019/2020 were down 31 percent from the previous week and 49 percent from the prior 4-week average.  Corn:  Net sales of 906,600 MT for 2019/2020 were down 51 percent from the previous week and 36 percent from the prior 4-week average.  Soybeans:  Net sales of 244,700 MT for 2019/2020--a marketing-year low--were down 53 percent from the previous week and 68 percent from the prior 4-week average. Soybean Cake and Meal:  Net sales of 158,700 MT for 2019/2020 were down 18 percent from the previous week and 2 percent from the prior 4-week average. T). Soybean Oil:  Net sales of 21,200 MT for 2019/2020 were primarily for Guatemala (5,800 MT), Mexico (5,700 MT), S...