Final answer:
A flat freight charge occurs when using uniform freight rate pricing strategy.
Step-by-step explanation:
The flat freight charge occurs when using uniform freight rate.
A uniform freight rate is a pricing strategy where a fixed rate is charged for shipping regardless of the distance or location. It is commonly used when the cost of transport is relatively low and consistent.
In the case of Ray and Wes, the online retailer charged them a flat freight charge because they purchased identical bowling shoes, regardless of the fact that they live on opposite ends of Canada.