Not able to display subtotal and subtotal text using SALV Factory method

Hi,

I am creating a report using cl_salv_table, factory method. The main two fields (among others) are product and amount. I want to show subtotal of the amounts for each product and before each subtotal I want a text to be shown (on the same row).

Something like:

Product              Amount

1                               10

1                               20

Subtotal text              30

2                                 5

2                               10

Sutotal text                 15    and so on ...

Searched various discussions but not able to get the right answer. The get_aggregations or get_sorts does not seem to be working or I am not using them properly. I have tried with creating a hidden column in the internal table with fixed value like "Subtotal" but again not showing the desired result. Please help (urgent).

Thanks.