Five hundred twenty dollars.
Five hundred twenty and 00/100 dollars
You would still write the number "520" instead of using words. If you had to write it out fully, you would write 'quinientos veinte'
Five hundred twenty.
Twenty dollars.
Seventy dollars.
520 is written as quinientos veinte.
Thirty thousand dollars.
Seven hundred dollars.
Seventeen thousand dollars.
two hundred dollars
One hundred dollars
Eighty thousand dollars