30 is the 2.4 tenth step squad and also a help squad that is 10+20
0.1 + 0.2 + 0.3 + 0.4 + 0.5 + 0.6 + 0.7 + 0.8 + 0.9 + 1 + 1.1 + 1.2 + 1.3 + 1.4 + 1.5 + 1.6 + 1.7 + 1.8 + 1.9 + 2 + 2.1 + 2.2 + 2.3 + 2.4 = 30
