The U.S. spends about $3.6 billion a month in Afghanistan, according to data provided by the Congressional Research Service recently.

The average cost per month is calculated at an average 51,000 U.S. troops in Afghanistan, but that number likely will go higher with the 68,000 troops the Obama administration already is planning on having in that country, and could double if President Barack Obama backs a reported request from Gen. Stanley McChrystal, the commander in Afghanistan, to send as many as 40,000 more troops to the country.

The cost of sending one U.S. soldier in Afghanistan for one year is $1 million versus an estimated $12,000 for an Afghani soldier, according to Steve Daggett, a specialist with the Congressional Research Service. Those numbers fall within the calculations that the Obama administration has been using. The Obama administration is calculating $1 billion per 1,000 troops deployed to Afghanistan.