CHICAGO (AP) _ Grain futures were mostly higher in early trading Monday on the Chicago Board of Trade. Dec. corn was unchanged at $4.42 a bushel. Dec. wheat was down 0.25 cent at $5.91 a bushel. Dec. oats gained 1.25 cents at $3.35 a bushel. Nov. soybeans was up 10.5 cents at $11.99 a bushel....