Need to simple =SUM

I have 60 worksheets within one workbook. Each work sheet is a time card and is identicle. Each time card has 15 cells to enter data. As I enter the data on the time cards the totals should add together on the totals worksheet. Is there a way to do this without going from each page individually and entering each cell. I have not been able to get a 3-D reference to work, but it looks like it should, but I get an error.

If I understand you correctly you want to get the sum of let's say A1 across all 60 worksheets.

Name the first sheet first and the last sheet last and then put all 60 worksheets inbetween then use:

=SUM(First:Last!A1)

If Jeffrey's formula doesn't workn please describe the error that you get

I did not get an error this time, but it did not add the data, it just placed a 0 (zero) in the cell. I was getting an error about a circular formula. the formula I just used was =SUM(first:last!D3). To check each tab checked on FIRST, held down the shift key and then checked the LAST tab.

What are you summing? What does the data look like?

Can you give us a sample of what your summing so we can assure you get the best possible answer?

You didn't include your summary sheet in the sheets being summed did you?

That would cause a circular reference.

Each cell just has a number in it. Such as in cell D2 I have DO for Days off. In Cell D3 I put the number of days off they had during the pay period, such as 12. I then need to have all the time cards D3 cells total on a separte sheet to show how many days off was accumulated over a five year period.

I did not include it to begin with, but when I could not get it to work I included it, that must have been when I started getting the errors. I worksheets are "GENERAL" do I need to change it to some other type of format?

Thanks for the help. I got it to work, but I am not sure what changes I made to get it.