New
#1
A math quiz
You've seen a SSD for $97. Since you have no money you borrow $50 from your dad and $50 from your mom. $50 + $50 = $100 right?
You buy the SSD and get $3 back. You give your dad and mom $1 each and $1 you keep. So you now owe your parents $49 each.
$49 + $49 = $98 + your $1 = $99, right? Where now is the other dollar?