Wheat:  Net sales of 521,900 metric tons for 2019/2020 were up 59 percent from the previous week and 38 percent from the prior 4-week average.  Corn:  Net sales of 284,500 MT for 2019/2020, primarily for Colombia (109,300 MT, including 29,500 MT switched from unknown destinations), Japan (75,600 MT, including decreases of 3,200 MT), Mexico (37,600 MT, including decreases of 3,000 MT), unknown destinations (20,900 MT), and Costa Rica (12,300 MT, including 31,900 MT switched from unknown destinations and decreases of 22,600 MT), were partially offset by reductions for China (700 MT), Panama (200 MT), and Jamaica (200 MT).  Exports of 474,400 MT were primarily to Mexico (214,900 MT), China (59,300 MT), Colombia (42,300 MT)...