Wheat:  Net sales of 526,300 metric tons for 2018/2019 were up 68 percent from the previous week, but down 2 percent from the prior 4-week average.   Corn:  Net sales of 1,699,400 MT for 2018/2019 were down 14 percent from the previous week, but up 28 percent from the prior 4-week average.   Soybeans:  Net sales of 2,391,400 MT for 2018/2019 were down 16 percent from the previous week, but up 92 percent from the prior 4-week average.  Soybean Cake and Meal:  Net sales of 427,400 MT for 2018/2019 were up 43 percent from the previous week and up noticeably from the prior 4-week average.   Soybean Oil:  Net sales of 13,700 MT for 2018/2019 were down 62 percent from the previous we...