Wheat:  Net sales of 239,800 MT for 2018/2019 were down 70 percent from the previous week and 49 percent from the prior 4-week average.   Corn:  Net sales of 173,400 MT for 2017/2018 were down 49 percent from the previous week and 55 percent from the prior 4-week average.   Soybeans:  Net sales of 152,700 MT for 2017/2018 were up 14 percent from the previous week, but down 37 percent from the prior 4-week average  Soybean Cake and Meal:  Net sales of 212,500 MT for 2017/2018 were up 3 percent from the previous week and 51 percent from the prior 4-week average.   Soybean Oil:  Net sales of 5,200 MT for 2017/2018 were up 7 percent from the previous week, but down 19 percent from...