SAP SD Pricing Configuration Scenarios

Dear Experts !!

I am doing configuration for a pharmaceutical company. The PRICING configuration they need is as under :

Company/Global Wise Price

Branch/City Wise Price

Channel/Subchannel Wise Price

Customer Wise Price

What I need to know is that what does these terms means? and how will these be configured in the system? will it be done like normal pricing that we do in SD or there is something else i need to do?