Question : Using =Sumif in excel to calculate costs between two dates across different sheets

Hi peeps

I am desperately trying to find a complex formula to calculate postage costs for different clients  but to be able to use a date validation criteria.

On sheet 1 I have client usage, client information and costings
On Sheet 2 (datasources) is all drop down combo data or data validation
on Sheet 3 (MCL Totals) is the location of the query/formula Im trying to ascertain

I have been able to calculate all costs for a client using =SUMIF command but would like to sort that further into a date range. For example companyA had x costs between 1/1/08 and 1/1/10

Many Thanks

Simon

PS The Account in the company next door had no idea .......... which I thought was a little worrying!!!!

Answer : Using =Sumif in excel to calculate costs between two dates across different sheets

Here's the revised workbook.
Rory

New-postage-Spreadsheet-Calculat.xlsx (354 KB) (File Type Details) 

revised date