SUMIF with INDEX and MATCH?

All,

I am hoping that you can help me with a Index/Match problem I am having. On the attached spreadhseet is an example of my issue.

In a nutshell, I want the summary section of the spreadsheet to sum my desired product and desired period detail and bring me back the total for that specific period and product.

I have to select 2 fields at present:

CELL B3 - SELECT PERIOD - This is the desired periods budget data I with to retrieve from the source data in A8:O21

AND

CELL B5 - SELECT PRODUCT - ALL products are listed in column A and are phased periodically as per the data in A8:O21


In Row 25 downwards is the summary data that i wish to retrieve from the source data.

In this example I have selected product D and using an index/match formula is bringing me back the budget data for product D of 2,000 in cell B28.

The index/match formula is detailed below (please note that i have also included an IFERROR to bring me back 0 instead of N/A):

=IFERROR(INDEX($C$9:$O$21,MATCH(B5,$A$9:$A$21,0),MATCH(B3,$C$8:$O$8,0))," ")

It this however giving me the incorrect value as the total budget for period 3 and D is 8,100 (sum of E13:E16).

How can i get the index/match function to sum all of product D to give me the correct budget for period 3 (or any for the periods 1-13 should I wish to change the period).

Your help is greatly appreciated.

PLEASE NOTE THAT I AM USING EXCEL 2010.

Mr_Vic