EYE ON RETAIL TIPSHEET IS BACK - Back by popular demand - look for it in your inbox every Tuesday and Thursday!   Costco August Comp sales (ex. gas & f/x) +3.4% / August Ecom -2.5% Press release   Visa, Mastercard Prepare to Raise Credit-Card Fees by Angel Au-Yeung at Wall Street Journal. "The fee increases are scheduled to start in October and April, according to people familiar with the matter and documents viewed by The Wall Street Journal. Many of the increases are for online purchases. The changes could result in merchants paying an additional $502 million annually in [...]