Total Purchases for Tier I Suppliers

Summary

I need to create an analysis that shows total purchases for specific suppliers.

Content

I need to create an analysis that shows purchase order line details such as quantity and line description for some suppliers (Tier I Suppliers) in a certain timeframe (In last 6 months).

For example:

Supplier Name / PO Number / PO Creation Date / Item Description  / Quantity

Can anybody help me creating this?

Thanks in advance!

Emre