This summary is based on reports from exporters for the period August27-September 2, 2021. Wheat:  Net sales of 388,400 metric tons (MT) for2021/2022 were up 32 percent from the previous week and 54 percent from the prior 4-week average.   Corn:  Net sales for the 2021/2022 marketing year, which began September 1, totaled 905,800 MT.   Soybeans:  Net sales for the 2021/2022 marketing year, which began September 1, totaled 1,471,900 MT.   Soybean Cake and Meal:  Net sales of 60,700 MT for 2020/2021 were up noticeably from the previous week, but down 9 percent from the prior 4-week average.   Soybean Oil:  Total net sales reductions for 2020/2021 of 1,600 MT, down noticeabl...