Wheat:  Net sales of 506,300 metric tons (MT) for 2020/2021 were up 44 percent from the previous week and 15 percent from the prior 4-week average. Corn:  Net sales of 2,027,100 MT for 2020/2021 primarily for unknown destinations (701,300 MT), Mexico (441,200 MT, including decreases of 2,500 MT), Japan (381,600 MT, including 38,200 MT switched from unknown destinations and decreases of 36,400 MT), Guatemala (166,700 MT, including decreases of 4,400 MT), and China (149,900 MT), were offset by reductions for Peru (8,000 MT) and Costa Rica (4,000 MT).  Exports of 750,200 MT were primarily to China (269,900 MT), Mexico (230,100 MT), Japan (139,800 MT), South Korea (65,100 MT), and Canada (21,800 MT).   Optional Origin...