President Trump’s deployment of thousands of active-duty troops to the U.S. border with Mexico could cost $60 million to $110 million, the Center for Strategic and Budgetary Assessments said Friday.

The cost estimate includes nearly $7 million for aircraft and helicopters and depends on whether the deployment until mid-December includes 10,000 or 15,000 total troops, according to Travis Sharp, a defense budget analyst at CSBA.