grind_rate = [ [ 100, 0, 0, 0, 0, 0, 0, 0, 0,], [ 30, 35, 20, 15, 0, 0, 0, 0, 0,], [ 25, 23, 20, 15, 10, 7, 0, 0, 0,], [ 20, 14, 14, 12, 11, 10, 8, 6, 5,],]