I have constructed a worksheet (20,000 cells) and wish to copy the formulae
(but not the entries) into a new worksheet in the same workbook. How can I do
this?

Secondly, I then wish to change some of the formulae referring to the month
of March (MAR_05) to April (APR_05) so that the totals from the previous
months' workshhet can be brough forward to the new (April) worksheet. Rather
that do this on a cell by cell basis (about 90 cells) is there a way to do
this in one move?