Trying to retain data in one part of my worksheet which comes from formula in another part

I have a worksheet setup to record household expenses and income (on a daily basis) and provide reporting at the same time. In part of the worksheet I record the daily expenses and income with totals at the bottom. I have very basic formula which adds up the daily amounts and gives a total for the month at the bottom. I then reference these cells in the part of the worksheet where I record the monthly totals. This works fine but when I come to the next month (which in my case will be February) I strike a problem. If I delete all the data for January with the idea of re-populating the worksheet with February's data then all the figures will disappear from the January month in the reporting section of the worksheet. The only way I can see around this, at the moment is to create another month section and reference those totals in the February section of the reporting part of the worksheet. You can imagine how big the worksheet would get if I had to do this for the whole 12 months of the year!

I have done the google thing and just gotten completely confused! I know what I am wanting to be done can be done but I don't have the knowledge, skill or time (for that matter) to do it without help.

Just in case any of you are wondering why don't I just get a personal accounting package off the web? Well, I have tried almost all of them and while some are very good I still keep coming back to Excel which I really love!!!

I have created a "view link" to my spreadsheet (I hope this works, this is the first time I've ever done this?) so you can see what I am trying to do (this may help in view of my above explanation may sound like rubbish) but I sure there is a way to do what I want it to do (cross fingers)...

https://onedrive.live.com/redir?page...GhB9O8gwm1Nxa8