Hi  Software Engineers,

I have many  attributes which is various prices columns in table records and I achieved SalesTotalAmount  Column with addition of new Attribute (adding various prices ).Can I  add as a user input (Tax) and Cumulative (dynamically calculate ) ? 

Dynamical place is SalesAmount and Cumulative. For that, I need to logic and how to implement  SalesAmount + Tax = Cumulative and next is the addition of previous cumulative .

For example:

SalesAmount          Tax              Cumulative 

16798                       1678             18476

30634                       5478              54588

27904                       2345             84837

Adding of various item is SaleAmount (Auto Calculate) and Cumulative is adding of SalesAmount and Tax . And want to desire in Cumulative with addition of previous Cumulative Amount . I want to share oml and check from there . 

Thanks.Hoping desire  result.

Hayasaka