MM - Purchase Pricing Procedure

Requirement

In One company there are 7 purchase organisation

1) Imports are done from 5 purchase organisation and our costing has got following manner - Basic + Commission + Custom duty

2) Local procurement which is done by 3 purchase organisation and our local costing = Basic + Freight

3) And we have 2 interstate purchase organisation and our costing = Transfer price + Freight

so, I want to know....

Is this the method of doing it in the system ?

or

If i have to configure exactly like this how would i have to do it?

Thanks in advance