Filling out itimized deductions, it talks about non cash donations over $500, does that mean at any one time or all donations total combined ? Thanks.

All combined for the tax year (including donations of "stuff" to Amvets, Purple Heart, etc.). Do you have acknowledgements/letters of receipt?

That is all non-cash donations made in 2015. You will need to submit Form 8283 if you have non-cash donations that, in aggregate, exceed $500.