Write a BNF definition for dollar amounts.

• Valid examples include:
  • $0
  • $30
  • $53,469
  • $1,250,450
• INVALID examples which should not be accepted by your definition include:
  • $00
  • $01
  • $0,500
  • $01,500
  • $1,43,935,0
• Note that a comma is always necessary for grouping every 3 numerals. There should be no leading zeros.

Below BNF code is what I've done so far. I'm stuck putting the commas grouping every 3 numerals.

::= "$" ::= "0" | | ::= [1-9] ::= "0" |