Herbal Store

I am trying to find out how long a store average herbal unsustainable. As the estimated years.
This is an assignment in my business class (GR 12) so any help would be greatly appreciated.

There really is not an "average" response. The fact is that most small businesses (about 8 out of 10) fail within 3 years. This includes ALL types of businesses. So if you want average, "it will probably be 1-2 years. If they are passed the three years, they last as long as the owner wants it to last.