I need help ASAP i'm doing math and we are do Addition with mixed numbers

A freight train is loaded with 12 1/2 tons of corn, 11 1/3 tons of oats, and 6 1/4 tons of wheat.how many tons of grain is it carrying? Note: Corn, oats, and wheat are considered grain


A) 29 1/12
B) 30 1/12
C) 29 11/12
D) 30 1/6