I have small company and use excel for invoicing and save each worsheet from
a tempate as a new invoice (unique number). I was wondering is the a function
i can use to calculate all the running totals? All the total and tax etc are
in the same cell s but on different sheets. can I save the all to a workbook
or do i have to start again or keep opening them individully as i am doing at
the moment?

sorry for the long question.