grind_rate = [ [ 100, 0, 0, 0, 0, 0, 0, 0, 0,], [ 20, 35, 25, 20, 0, 0, 0, 0, 0,], [ 20, 23, 20, 15, 12, 10, 0, 0, 0,], [ 20, 13, 13, 12, 11, 10, 8, 7, 6,],]