20 to a 100 dollars

The author showed a turn of the century advertisement that claimed a cartoonist could make 20 to a 100 dollars a week. "That still remains true a hundred years later," he observed. The audience found the remark funnier than I did.
-- Vancouver Art Gallery Krazy! for comics in The Vancouver Courier, Friday May 23 2008

Correction: 20 to 100 dollars. However, I was taught that in published work one should write out the numbers, as in, twenty to one hundred dollars.