Judging by what i have read on here, and i think i am right in thinking this.

You add the 3 numbers above in your post - 34,37,35.2 which equals 106.2.

You then find the next number above this which is divisable by 75. Once you find this number, you subtract the number above from it.

Don't quote me on this though, your best off waiting on someone who knows what there definitely talking about. This is only what i have read