Can you solve this mystery?

Interesting Puzzle : Can you solve this mystery?

I saw a shirt for $97.
I borrowed $50 from mom and $50 from dad.
I bought the shirt and got $3 change.
I returned $1 to mom, and $1 to dad,
and kept $1 for myself.
Now I have to return $49 to mom
and $49 to dad.
$49 + $49 = $98 + my $1 = $99
Where did the other $1 go?

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