Once your order has been delivered, we add together all the eligible, like-for-like products in your order and compare the total price against what it would have cost from tesco.com, including promotions and Clubcard prices. Prices on individual products may vary a little, but the combined price of your like-for-like shop will always be checked, and if it did cost you more from Ocado, we will send you a voucher for the difference.