Don't we already know approximately how much? It's 20 - 28 % of the UN's operating budget. You can look at the UN website and do the math if you want. It's a lot! And it's worth it. The UN has been the most successful peace keeping organization in the worlds history. Besides, selling this as a "transparency" vehicle is misleading. In reality, it is intended as punishment for the UN's resolution critical of Israeli settlements and also to snub Obamas decision not to veto it. Irresponsible and childish politics!Sad!