Washington (CNN) President Donald Trump's decision to deploy US active duty troops and earlier deployment of National Guard forces to the southern border could cost between $200 million and $300 million, according to an independent analysis and Department of Defense figures on guard deployments.

The Pentagon has yet to determine the cost of the operation, nor has it identified the account where the funding would come from. But the Center for Strategic and Budgetary Assessments estimates that the cost of placing active duty troops on the border could range from $42 million to $110 million.

That would be in addition to an estimated cost of $182 million for the already announced deployment of National Guard troops to the border in May.

CSBA says that on the high end, the deployment would cost $143 per troop per day for operating and maintenance costs and $112 per troop per day on the low end. CSBA also estimates that the use of military aircraft in this deployment would cost about $136,645 per day.

With the mission currently set to take place November 5 through December 15, for a total of 41 days, the cost of deploying 8,000 troops and air support ranges from approximately $42 million to $55 million, according to the CSBA estimate.

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