(Figure: Biscuits and Cookies PPFs) Looking at Greg and Melissa's production possibilities frontiers (PPFs) , what production and trade situation would allow both Greg and Melissa to consume a combination of biscuits and cookies outside their PPF? 
Definitions:
Traditional Cost System
A costing method that allocates overhead costs based on a single volume-based cost driver, such as labor hours or machine hours.
Purchase Order
A document issued by a buyer to a seller, indicating types, quantities, and agreed prices for products or services.
Batch-level Activity
Refers to tasks that are performed each time a batch is processed, affecting multiple units of product but not directly correlated to each individual unit.
Departmental Overhead Rates
Specific rates used to allocate overhead costs to products or services based on the expenses incurred by different departments.
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