A primary objective of is to get your name known to the market place. If you ain't known, no one will come running to your door & buy what you have to offer.

When you do advertise it is very difficult to say what additional business did you pick up. If you get a 3% or greater responsible to your ad that is considered a very successful ad program.

If you are merely offering products that are already sold in the market - then you have a tough time - you need to be price attrative and of equal quality (be able to prove it too)

As it often said "if you want to go fishing, you first have to cut bait."