I've just done a bit of online shopping and it got me thinking as to how we used to manage in days gone by. It's so easy nowadays to stay at home and do your shopping from the comfort of your armchair. You don't have to go out in all kinds of weather, you don't have to hang around waiting for a bus and then struggle to get on it with all those heavy bags, and you don't have to wear yourself out carrying those bags from the bus stop to your house. (Ok, so maybe it's different if you have a car, but not all of us are that fortunate).
Even if you do have a car it could still work out cheaper. It would probably depend on how far you are from the supermarket but taking into consideration the cost of fuel for the car and then comparing this against the supermarket's delivery charge of £3.00, over time it could save you quite a few pennies. It's certainly cheaper than paying bus fares of £1.70 each way. It's even cheaper if you are going to be in all day and you don't mind what time they deliver your shopping, in that case the delivery charge is only £2.00.
How did we ever manage in the days before computers? I know we had a lot more energy back then and probably thought nothing of catching two buses while carrying loads of shopping bags (and at a time when the bus fare was probably less than 5p each way), but for all the heavy stuff - the computer wins every time.