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What Could It Cost? tests if you really know how much you spend on your groceries. With supermarket prices having changed so much in the last few years, it's surprisingly difficult to remember how much a bottle of coke or a banana costs these days.

The game shows you 5 products sourced from trolley.co.uk's Grocery Price Index, and quizzes you on how much they cost. The closer you guess to the actual price, the higher your score. If you are more than £2.50 away from the price, you score 0 points.

Prices for products are sourced from a price index which averages prices across many UK supermarkets, which means they may not have the exact price you would pay at a supermarket.