CALCULATING DATES

[Paul Hayer]

Hi,

I want to be able to show the total of the  subtraction of  the "returned
date" from the "from date" for each department for each month.
This to be done on a range of a year, and then when the next month comes
round for the calculation to take that month into account, so, shifting the
range to calculate by a month forward.

Thanks in advance.