Current filing fees can be found at www.uscis.gov. There will be other costs associated with sending the application and there may be other costs associated with getting the supporting evidence or documents needed for the application. Lawyer fees are determined on a case-by-case basis.
If you have any questions regarding immigration or US citizenship, please feel free to call me, immigration and citizenship attorney Shawn Mesa at (813) 679-5780.
Disclaimer: This information is provided as a public service and not intended to establish an attorney-client relationship. Any reliance on this information is taken at your own risk.