grind_rate = [ [ 100, 0, 0, 0, 0, 0, 0, 0, 0,], [ 30, 30, 20, 20, 0, 0, 0, 0, 0,], [ 25, 23, 20, 15, 10, 7, 0, 0, 0,], [ 20, 15, 14, 13, 11, 9, 7, 6, 5,],]