Adding prices into areas of product catalog

Hello,

I need to create a report which generate a product catalog form xls files. I did not find any function or class so far, and my report insert records into follwing tables:TWGLV,TWGLVT, WLMT for areas data and into table WLBM for materials.

The report works fine, except the catalog price is not available. How is possible to insert prices into a product catalog for materials? Which price condition should be read?

Thank you

Bogdan