Bill is that 5-10% a benchmark from somewhere?
The real question is not how much but where you spend it. My wash is in a suburb of a major city, and the local newspaper has been most effective for me in advertising. It's a free local newspaper that you pick up at any local store, in my type of demographic I never thought this rag would produce the results that it does. I was spending double the amount to mail in valpak and I was getting less than a .5% redemption rate.