To perform calculations, FormCalc needs to know what object to use in the calculation. In this step, we want to find out the total of all the data in the Amount column. If you select a cell in the Amount column, you can see the internal name in the Script Editor (if you resize the Script Editor to be larger).
Livecycle designer quickstart 2.9.21.1 Inserting the subtotal at the bottom of the table
Livecycle total Inserting the subtotal at the bottom of the table
The wildcard character (*) tells LiveCycle Designer ES to collect all the data in the rows labeled Row1 and all the data in the Amount column.

Inserting the subtotal at the bottom of the table