How to calculate the average daily revenue?
First, find the total revenue.
Then, find the number of days that the store was open, the person was working, etc...as you'll need that :)
Finally, divide the revenue by the total number of work days, days the store was open, etc.
Simplified model: Your store earns $700 in a week. It was open every day during the week, Sun through Sat. Daily average revenue = $100.