Oh no, fossils only hours!
Agatha and Albert blocking the aisle while they discuss whether to get a 32 box or a 48 box of Tetley's tea bags...
"But Albert these work out at 3/59ths of a penny per bag cheaper."
"Yes, but if we get a 48 box we will have some left over when we next shop and that will mean getting a 16 box so overall it will be dearer."
"Oh you are so clever Albert, a 32 box it is."
.
.
.
"Ah, but wait, Albert. If we get a 48 box one shop and then another 48 box the next shop we end up with a tea bag free shop the time after.... and it's a lot cheaper."
"Agatha, you old abacus, you."
And because they are old you just have to stand there an let them get on with it.
Now if they are the young sorts you just bellow "SCUSE ME!" and barge them out the way and get your shopping done and be home.
Every silver lining has a cloud.