Hi everyone, I would like to know what is the advertising budget for a small internet business. I am running a small homebased internet business, most of my products are offer thru my web site....so I am using "pay-per-click" thru overture and google adwords. They are effective but quite costly. Is there a rule such as how many % of total sales should spend on advertisment? Is 20% of total sales too much or too less? If anyone could give some advises or comments, I would appreciate that. Thanks in advance!

Dion