How to reprocess information in a table?

Hello.

This is my question, I have a table with sales data at product level in LB. In another table I have the cost by product.

The cost table is updated in a regular basis.

I need to calculate the final cost by multiplying the volume by the cost at product level.

Instead of having a formula at report level I'd like to let HANA update the final cost at DB level in a new filed in the sales table.

Is there a way to do this? This would allow me to leverage the process to the db instead to do it in the report.

Thanks.