Passage Summary: Since men only need five drops of a hair oil daily and extra doesn't help, the maker thinks a discount won't make people buy more or help the company's profits.

Conclusion: Offering a price rebate for the hair growth ointment will fail to increase sales and will result in a loss for the manufacturer.

Reasoning: The product is already effective at the recommended dose, and using more than that dose provides no additional benefit to the user.

Analysis: The manufacturer is thinking like a scientist but failing as a marketer by only considering current users. While it's true that a current customer won't buy more just to dump extra on their head, a rebate is often used to lure in *new* customers who were previously deterred by the price. To strengthen the claim that sales won't budge, we need to find a reason why new customers still won't buy it even with the discount. Look for an answer that suggests the price isn't the reason people aren't buying it, or that the pool of potential customers is already exhausted.