I want to create a workbook (Or another sheet on my already existing Excel Workbook) that will calculate the income from each day.
I just need to know a calculation which will carry on adding the total, regardless of a cell being emptied then re-entered with new information.
If possible i'd also like the workbook to be able to be archived, so that the following week I am able to do the same thing.

Thankyou to all who help me :}.