(NAFB.com) – Sales of corn to overseas buyers jumped week to week while soybean sales declined, according to the Ag Department. Corn sales in the seven days that ended on Nov. 28 jumped to 1.73 million metric tons, up 63% from the previous week and 4% from the prior four-week average, the agency said. Mexico was the big buyer at 392,400 metric tons, followed by Japan at 357,700 tons and an unnamed country at 283,600 tons. South Korea was in for 212,700 tons and Costa Rica bought 84,200 tons. The total would’ve been higher, but Guatemala canceled orders for 27,700 tons. Exports for the week rose 3% to 1.05 million tons, USDA said. Soybean sales fell 7% week over week to 2.31 million metric tons, the government said. That’s still up 17% from the average for this time of year.