How Much Do We Spend in Iraq & Afghanistan

How much does the US military spend on the wars in Afghanistan and Iraq. Apparently, no one knows. Here is what the General Accounting Office says about Pentagon accounting.
"Neither DOD nor Congress can reliably know how much the war is costing and details of how appropriated funds are being spent."
It's just a guesstimate that we spend $5 to 6 billion a month in Iraq, but chances are not likely we are spending less.