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.
Eighty thousand dollars
Thirty thousand dollars.
Seven hundred dollars.
Seventeen thousand dollars.
One hundred dollars
two hundred dollars