Menu prices rose 0.3% month-over-month in August, and the 12-month gain moderated to 6.5% from July’s 12-month 7.1% gain. But grocery-store price increases also kept moderating, rising only 0.2% m-o-m and posting a 3% 12-month increase, down from 3.6% in July. That more than three-point separation continues to favor budget-minded shoppers moving more of food…