Reg Stractures in SAP SD Pricing

Hello ALL,

Can any one please tell me how to understand the structures in SAP SD i.e. KOMK and KOMP when i see requirement it is talking about some fields and structures.

Please explain me how this concept works.

For example

I have this calculation in one of my requirements of my pricing procedure

XKWERT = KOMK – KNVG1 * 1000

In this what does it mean i know KNVG1 is for us customer group 1 this is used for the calculation of freight . I.e. ALT Cal Type.

Just brief me how does it woks in Pricing.

Regards,

Rani