How to take first value as default value in design studio through scripting

Hi,

I am Working As a BO Consultant,Present I am working On Xcelsius dashboards have created Top 10 Customers client need Same dashboard in Design Studio I have Implemented but I am Facing Small Issue while doing this. My Question is once i run the dashboard based on  from and to date customers will update and same time materials need to update based on from and to date and on first  customer at Initial(Here want to take Hero moto corp at first time )after that based on selection in customers automatically materials will change by using Set filter,But how to take first customer to effect for Material at first initial running,Could you please help on this.

From Date 02.2014 to Date as Blank

customers             net value                                   materials             net value

Hero Moto Corp     1000000

Tvs Motocorp          200000