Its easier if you drop the redundancy. Write $5, not $5 dollars. The dollar sign denotes the unit, there is no reason to add the word after. Alternatively you

Its easier if you drop the redundancy. Write $5, not $5 dollars. The dollar sign denotes the unit, there is no reason to add the word after. Alternatively you could just write "5 dollars", there is no need for the dollar sign when you write "dollars" right after. That way you dont have to worry about keeping your redundant units in sync.