"As seen in the year-by-year breakdown listed above, the total amounts (in real dollars) that NASA has been budgeted from 1958 to 2008 amounts to $592.380 billion dollars -- an average of $11.847 billion per year. According to the Office of Management and Budget and the Air Force Almanac, when measured in real terms (Meaning: if the value of $1.00 at today's rate equaled the value of $1.00 in 1958), the figure is $810.459 billion, or an average of $16.290 billion dollars per year over its fifty year history.

For comparison, the Afghanistan and Iraq Wars have cost U.S. taxpayers approximately $604 billion over the past seven years vs. the entire fifty year history of NASA expenditures. [2] [3]

NASA's current FY 2008 budget of $17.318 billion represents about 0.6% of the $2.9 trillion United States federal budget."
http://wapedia.mobi/en/NASA_Budget

So, if they want to blame NASA entire budget on the Moon from the time NASA was established to the present, they are somewhat close. And they throw in all the spending on space from the Dept of Defense it's even closer.

But if you just want the cost of Apollo program:
"According to Steve Garber, the NASA History website curator, the final cost of project Apollo was between $20 and $25.4 billion in 1969 Dollars (or approximately $136 billion in 2007 Dollars)."