You might not notice it when you’re at the supermarket, but those $20 or $30 bills can quickly add up to a few hundred dollars each month, just on groceries alone. Check out this list to see the credit cards that will give you the best discounts and cash backs for grocery shopping. — Earlier this week, we published an article sharing 10 useful tips for saving on groceries. Some of the tips included: looking out for supermarket advertisements and coupons in Thursday’s newspapers, shopping in bulk for discounts, buying house brand items, as well as signing up for memberships to earn points to offset future spending. Apart from these tips, there is also another way to slash grocery spending for all you frugal shoppers out there. That is, take advantage of your credit card’s rewards programme to earn additional cash backs and rebates. Here are the best credit cards ......