 So one thing that we did was we when we typed out this total notice what we had to do. We had constantly add in H1 14 we had to do this a lot. What happens if Tobias buys another book? Well crap I got to do all that. I got to insert another row. I got to add it to this I got to do all this stuff again very annoying Very annoying so what else can we do? One of the things we have in our arsenal of things we can mess around with is this auto some Button you can kind of even as we mouse over it does exactly that automatically add it up It will add everything above us. Excel is actually really good at sort of understanding Where in relation notice what happened I click on that it sort of already got Add this number this number this number this number this up and this one all of these numbers pretty nice So as I hit enter now if I were to say add in another book and I'll just do the pricing $50 book automatically is gonna effectively go through that process and update the total as necessary