His choice to sell his watch for combs is ironic since it would end up being a waste, since Della ended up cutting her hair to get him something for his watch. So neither of them had any use for the gifts they got each other.
Also because if they do it back to back they won’t see anything wrong with the rough draft because they just did it
No because the seven in the tens place is equal to 70 and the seven in the hundreds place is equal to 700.