Passage Summary: Even though shoppers use coupons to save money, stores that provide them usually charge more overall because they raise their prices to cover the expensive process of making and mailing those coupons.

Reasoning: Retailers that offer coupons generally have higher average prices even after discounts because the high costs of coupon production and distribution are passed on to consumers.

Analysis: Since this is a 'Must be True' question, we are looking for a deduction that follows logically from the provided facts. The stimulus establishes a paradox: coupons are meant to save money, yet the stores that offer them are more expensive on average than those that don't. This suggests that the 'savings' from a coupon might be offset by the higher base prices of the store. Look for an answer that acknowledges that shopping at a non-coupon store could potentially be cheaper than using coupons at a store that distributes them.