Condition type without access sequence defined

Hi all,

Normally an access sequence is assigned to a condition type, then the system search the condition tables listed in the access sequence to get the right price.

But I found for some condition types which have no access sequence defined, how dose the system calculate the price for such condition types?

Another question is how dose the system get net price? When creating a order in VA03, a net price is automatically generated. Where dose this value come from?

Thanks!

Regards,

Hui