Adding market growth as a New row after each brand growth YoY

Hi,

I am looking into electronics market.I have vendor (asus,lenovo etc) growth in 4 quarter.

Dummy Data look like this

Vendor           2013Q1      2013Q2      2013Q3      2013Q4

Asus               5 %              4 %                3          2

Lenovo               5               3                    2

HP

Market Growth    

I want to add market Growth. I created a cacluated field for 2013q1 with

Total (Sum[2013Q1])) -Total (Sum[2012Q1])) / Total(Sum [2012Q1]))

Similarly for all quarter

But i am unable to show that below all vendors