Ive noticed this before and it bugs me.
Im on quite a tight budget so i dont just tend to throw things in the trolley - ok so im tight! So when it comes to veg i like to know im getting the best value i can - so, do i buy the value pack, do i buy it lose or do i buy the non value pack (there is often not that much difference in price).
So, for "ease of comparison" i suppose - on the price ticket on the shelf, you are given the price per pack, then you are given the price per kilo, OR pound, OR per 100g which then means a bit of mental arithmetic before you can compare with the loose products.
I think this follows with non veg items too, but can't remember.
AIBU to think that is ever so slightly devious - as most people don't want to be standing in tesco actually "thinking" about their shopping.
Why can they not just have a price per kilo on the ticket? Um, probably because it is significantly more expensive and people wouldnt buy it if it was put in black and white for them!!