Analyze each scenario, and explain the type of mistake that has occurred. Is it a legal mistake?

Scenario 1: Ling purchases a pair of shoes from SportsCo for $200. Ling later sees the same shoes at AthleteCo for $150, and regrets purchasing them from SportsCo.

Scenario 2: Preeti purchases a pair of size 8 shoes from SportsCo. Preeti later realizes the shoes are size 7, and regrets purchasing the shoes.

Scenario 3: Yafa purchases a pair of shoes from SportsCo. Yafa later sees the shoe box is full of shoe laces and there are no shoes inside.