And we got that to be 30. That's our total sum of squares. And we asked ourselves, how much of that variation is due to variation within each of these groups versus variation between the groups themselves. So for the variation within the groups, we had our sum of squares within. And there we got 6. And then the balance of this 30, there's no units here, the balance of this variation came from variation between the groups. And we actually calculated it and we got 24.