Transactions at cash registers at the supermarket Metro Chevrefils on the Plateau Mont-Royal in Montreal. Transaction at cash register and payment in cash or by card (debit card, credit card) with cashiers who pass the articles on the optical drive (some anonymous shots). Cashier counts the $ 20 bills. Keywords: PLATEAU MONT-ROYAL DISTRICTS,CREDIT CARD,CREDIT,GROCERIE,RICHELIEU METRO,MONTREAL (CITY),FOOD PRODUCT,METHOD OF PAYMENT