For example: If your sales are $1000 (for simplicity's sake) and you had 20 customers that day, you would divide $1000 by 20. That means that the value of your average transaction was $50.00.
You can calculate your average transaction on a daily, weekly, monthly, quarterly, or annual basis! Its entirely up to you.
Want to know what to do with the information?
There are tons of things you can do! You can monitor your average transaction for things that seem to affect it or use it as a motivational selling tool!