Wheat:  Net sales of 131,200 metric tons for 2018/2019--marketing-year low--were down 78 percent from the previous week and 76 percent from the prior 4-week average.      Corn:    Net sales of 459,800 MT for 2018/2019 were down 9 percent from the previous week and 64 percent from the prior 4-week average.   Soybeans:    Net sales reductions of 612,000 MT for 2018/2019--a marketing-year low--were down noticeably from the previous week and from the prior 4-week average. Soybean Cake and Meal:    Net sales of 124,700 MT for 2018/2019 were up noticeably from the previous week, but down 39 percent from the prior 4-week average.    Soybean Oil:    Net sa...