Wheat:  Net sales of 335,700 metric tons (MT) for 2020/2021 were down 31 percent from the previous week and 42 percent from the prior 4-week average. Corn:  Net sales of 1,609,200 MT for 2020/2021 were primarily for unknown destinations (360,200 MT), China (359,700 MT, including 140,000 MT switched from unknown destinations), Japan (329,900 MT, including 83,400 MT switched from unknown destinations and decreases of 1,800 MT), South Korea (201,700 MT), and Colombia (118,400 MT, including 30,000 MT switched from unknown destinations and decreases of 29,400 MT), were offset by reductions for El Salvador (17,400 MT) and Canada (4,700 MT).  Exports of 902,000 MT were primarily to Mexico (213,000 MT), China (209,700 MT), South Kor...