have to add a $ symbol to my round double column

I am looking at above post where it says a solution, but didn’t know how ti use it.

can anyone share a sample wokflow on how we can add a $ to a numeric column, i cannot convert it to string as it has to maintain the , and the .

My sample data

Expected output

$11,376.25

$10.00

$10.28

$1,184.56

$11,741.78

$10.00

$70.54

$12.44

$3,119.22