Just had the substitutions email about our groceries and the final totals break down like this:
My stuff: £2.18
Steve's stuff: £26.28
Joint stuff: £9.57
So Steve's stuff is well over half of the entire grocery order and I'm predicting that his ham, crisps, pork pie, egg custards, and cocktail sausages will all go to waste, along with at least one box of Actimel, just like happens every week. It doesn't matter though, 'cos he's not the one paying for it!