This answer on a nearly identical question has some comments but no answers that seem to fully address this question, though I think this one comes close.
An example:
What if I make the menu for the week (or two weeks, since you shop for two weeks, right?)? Then you don't have to worry about it.
Or
What if I make the menu for the week (or two weeks, since you shop for two weeks, right)? Then you don't have to worry about it.
Or
What if I make the menu for the week (or two weeks, since you shop for two weeks, right?) Then you don't have to worry about it.
All of these seem pretty awkward. Is there any rule for this?