After Dina stepped down as assistant manager, the store manager needs to find her replacement. Amy knows she is the likely candidate but declines the offer before Glenn can offer her the position. Her rationale conforms to the income-leisure tradeoff model. Since there is no increase in earnings from the assistant manager position, Amy doesn’t want to spend more of her time away from leisure. The scarcity of time available in her day means she must make tradeoffs on how to spend her time and she would rather spend it on her college classes.