How to sum matrix table all rows in ssrs

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SSRS-2008

I have designed matrix table in ssrs, all items are displayed in columns and counts are displayed in rows.. I need sum of all items in final row i.e, footer.

My problem is:
1. sum of all items values displayed in all columns.
2. sum of all items values displayed in every groups. but i need only in footer.

I need solution for this.

I need sum of every items in footer,

Actual Table Values:
Item Name Qty
Item-001 3
Item-002 5
Item-001 2
Item-002 1

Matrix Table:
Date - Item-001 - Item-002
24-02-16 - 3 - 5
25-02-16 - 2 - 1

My Problem is Every date footer shows: 11 in all footers

What I have tried:

I just tried: Expression for that count textbox:

=Sum(Fields!MatQty.Value)