I am working in MS Access 2007. Question - I have a calculated field that displays a double--a number with digits after the decimal point. How do I

I am working in MS Access 2007. Question - I have a calculated field that displays a double--a number with digits after the decimal point. How do I convert the output to currency format? If you could let me know how to do this by tonight or tomorrow, Saturday, February 16 in afternoon (eastern time), I would really appreciate it. Thank you.