There are several types of RFQ, Including Catalog RFQ, Standard RFQ, and Bid RFQ. There are only two classes of RFQ. Identify the two valid classes and their appropriate purposes. (Choose two.)

In Oracle Purchasing, RFQ and Quotation classes determine the structure of the response:
- Bid Class (A) — Used for a specific, fixed quantity and ship-to location. Quotation lines support Shipments (each line references a specific shipment with quantity and location). This is used with the Bid RFQ type.
- Catalog Class (D) — Used for items purchased repeatedly. Quotation lines support Price Breaks (quantity-based pricing tiers). This is used with Catalog and Standard RFQ types. These are the only two valid RFQ classes in Oracle Purchasing, each with the purposes stated.

B. Standard Class, which supports Items — "Standard" is an RFQ type, not a class; there is no "Standard Class" supporting Items.
C. Planned Class, which supports Catalogs — No "Planned Class" exists for RFQs; "Planned" applies to Purchase Orders, not RFQ classes.
E. Cost Class, which supports Bid Price Breaks — No "Cost Class" exists in Oracle Purchasing RFQ definitions.
F. Category Class, which supports Supplier Catalogs — No "Category Class" exists for RFQs; category is an item attribute, not an RFQ class.
G. Contract Class, which supports Total Dollars Agreed to — No "Contract Class" for RFQs; total-dollars-agreed relates to Contract Purchase Agreements, not RFQ classes.

1. Oracle Purchasing User's Guide, Release 12 (Part No. B28669-03), Chapter 4 "RFQs and Quotations" — Section "Types of Quotations and RFQs" and "RFQ and Quotation Defaults," which define Bid, Catalog, and Standard types and the Bid and Catalog classes (supporting Shipments and Price Breaks respectively).

2. Oracle Purchasing User's Guide, Release 12 (Part No. B28669-03), "Defining RFQ Classes" — describes that Catalog class quotations use price breaks and Bid class quotations use shipment-specific entries.

3. Oracle E-Business Suite Procurement Documentation — "Entering RFQ Headers" and "Entering Quotation Shipment/Price Break Information," confirming Bid = Shipments and Catalog = Price Breaks.

Verification note: The Oracle documentation part numbers reflect the R12 Purchasing User's Guide. Because 1Z0-520 is a retired legacy EBS R12 exam, the specific page numbers in the "RFQs and Quotations" chapter should be cross-checked against your licensed copy of the guide, as printings vary. The conceptual mapping (Bid→Shipments, Catalog→Price Breaks) is consistent across all official R12 Purchasing documentation editions.