I was confuse and can't get this two question answer

Question 1.
You borrow money from Dad $25 and borrow money from mum $25.
The total is $50.

You buy shirt $44. The balance is $6.

You take the balance $2 return to your dad and take $2 return to mum.
The money left $2 at your pocket.

The debt for your dad left $23 and your mum left $23.
$23 + $23 = $46.

$46 (debt) + $2 (left in pocket) = $48..
Where is the missing $2?...


Question 2.
You borrow money from Dad $25 and borrow money from mum $25.
The total is $50.

You buy shirt $45. The balance left $5.

You take the balance $1 return to your dad and take $1 return to mum.
The money left $3 at your pocket.

The debt for your dad left $24 and your mum left $24.
$24 + $24 = $48.

$48 (debt) + $3 (left in pocket) = $51..
Where the $1 come from?...


huh..
Any idea... Anyone can help me solve this?