Cooking & eating on a budget: How much do cooking appliances cost to use & tips on saving energy

When looking to cut down on the money we spend on food, most of us know we need to shop smarter, plan out meals or cut out the takeaways. But, one hidden cost of eating - is the energy we use to cook with. Do you know how much gas and electric different household appliances use? And are you using them to the best of their efficiency?