if those guys who dined were wondering about missing $1.00, it is okay, let those stupid dumbasses wonder. If our balbahadur wonders about it, then it's a problem. still hope that our balbahadur does not need to be admitted to grade 2 again to learn this kind of math problem, which is not puzzle at all.

anyway, total they spent = $70 for bill + $2 for tips = total of $72, not $74. So, there is no question of missing $1.00.