You want to buy a Laptop of 97k but you have no money, so u borrow 50k
form your mum and 50k from your dad, making a total of 100k.
After buying the Laptop, you have just 3k left, hence you gave your mum
1k and your dad 1k and you kept the remaining 1k. This means you are NOW
owing your dad 49k and your mum 49k.
So if u add the 49k of your dad and the 49k of your mum, plus the 1k with you (49+49+1) equal 99k.
