This document discusses effective purchasing controls for perishable and non-perishable goods. It defines perishables as products with a shelf life of 1-3 days like meat and produce, while non-perishables can last months in storage like canned goods and dried foods. The document outlines standards for purchasing the right products at the right time and price, and proper food storage. It identifies characteristics of effective purchasing controls and potential errors to avoid like overpurchasing or poor supplier relationships.