Wheat:  Net sales of 657,100 metric tons for 2018/2019 were up 40 percent from the previous week and 59 percent from the prior 4-week average.   Corn:    Net sales of 1,712,800 MT for 2018/2019 were reported for Mexico (623,200 MT, including decreases of 4,100 MT), Guatemala (161,400 MT), Japan (124,500 MT, including 124,000 MT switched from unknown destinations and decreases of 70,400 MT), Egypt (110,500 MT, including 55,000 MT switched from unknown destinations), and Peru (92,900 MT, including 21,500 MT switched from unknown destinations and decreases of 1,000 MT).   Soybeans:    Net sales of 870,700 MT for 2018/2019 were reported for unknown destinations (351,700 MT), Spain (104,600 MT, incl...