Passage Summary: A salesperson tells a landlord to buy a weaker air conditioner instead of a stronger one at the same price, simply because the weaker one gets the job done.

Conclusion: The landlord should purchase the less powerful air-conditioning unit.

Reasoning: Although a more powerful unit is available for the same price, the less powerful unit is sufficient to meet the landlord's specific needs.

Analysis: This advice is a bit counter-intuitive because we usually expect 'more' to be better if the price is the same. The underlying principle must be that one should not acquire more capacity than is actually required for the task at hand. Look for an answer that suggests the adequacy of a tool for its intended purpose is more important than its maximum potential power.