How to calculate total amount from a dynamic table?

Hi all,

In an ADOBE form we have defined fields(Field1) in different columns of a table. We have a dynamic button that adds row in the table.

Now I need to get the total amount of the Field1 which has been defined in the table columns bearing in mind we will have different rows.

Eg.

Row 1

Field1

100

Row 2

Field1

200

So, I want to get the total amount, in this case it should be 100+200 = 300.

Can anyone suggest how to get the total amount of Field 1?

Thanks a lot

Akki