Function Logic

Here is a problem I could really use help with. My new company I have joined does not believe in using computers. Everything is paper and pencil to which I like in some respects but in others it sure is nice to have a machine to work it for you.

My issue is: we track sales by the hour for each hour of the day from 10am until 11pm each day. The data goes back about 36 weeks to which I am prepared to enter into an excel spreadsheet to start working with the numbers.

Here is the help I need... I would like to enter the current data on line 5 each time for each cell for each hour going horizontally and just insert a line there to move the older data down as time goes by. Now, I would like on line 3 to give me an average of all the data going downward in the column. That is the easy part. My question is: can I put a formula or function in Line 3 that would update with the average of the column but would automatically update the equation the additional line added at the bottom or the top? My line 5 would be consistent but as time goes by weekly, following weeks data would be moved down one row to which the bottom line would increase as more data was entered.

Any ideas as to how I could make this work?

Thanks,
Joe

Your post does not comply with Rule 1 of our Forum RULES. Your post title should accurately and concisely describe your problem, not your anticipated solution.

Use terms appropriate to a Google search. Poor thread titles, like Please Help, Urgent, Need Help, Formula Problem, Code Problem, and Need Advice will be addressed according to the OP's experience in the forum: If you have less than 10 posts, expect (and respond to) a request to change your thread title. If you have 10 or more posts, expect your post to be locked, so you can start a new thread with an appropriate title.

To change a Title go to your first post, click EDIT then Go Advanced and change your title, if 2 days have passed ask a moderator to do it for you.

(This thread should receive no further responses until this moderation request is fulfilled, as per Forum Rule 7)