Copying "SUMIFS" formula

[taryn]

Hello

I attach a sample of a workbook I am having problems with. I have a list of data (worksheet "All Data") and would like to summarise this (worksheet "Summary") - see attached.

I have come up with a formula, but am having trouble copying it to other cells.
In its current form, i.e.=SUMIFS('All Data'!$D:$D,'All Data'!$A:$A,"ABELOV",'All Data'!$C:$C, ">=29/12/2014",'All Data'!$C:$C,"<5/1/2015") the formula returns the correct value for cell C6 in the worksheet "Summary". However, I can't copy it across and down correctly.

I would like to be able to substitute:
the contents of cell A6 for "ABELOV";
the contents of cell C5 for ">=29/12/2014"; and


the contents of cell D5 for "<5/1/2015"
so that I can copy the formula across and down without having to type the names of the different Administrators or the date ranges. However, I cannot seem to do this.

Can someone help?

Thanks.

Taryn

PS I am using Excel 2010 on Windows Professional 7