Formatting a formula field

Formatting a formula field

I have a formula field on a form that displays the values without the commas and currency symbol.  How can i change to my desired format?

Expression: (Amount  *  Chance  /  100).round(0)

Explanation: The formula is taking a currency value (Amount) multiplied by a percent value (chance) to give a weighted amount value.

Format now: 1000000

Desired format: $1,000,000

Thanks,

Jon