dow jones futures, page-13

There must be someone who knows how this is derived .. anyone?

My last post:
I understand the basics ... but after yesterday I do not trust the +- value I am seeing ... cnn is still stuffed showing -354.

Can anyone explain the basis of this variation value ... based on bloomberg figures the pivot point is being calculated based on a value of 13355 ... where does this figure come from? How does this relate to the previous close of 13300?

Thanks.