Answer if you can!

Answer this question?
If I have to go to market,
I am not having money to go,
I met my two friends,
one gave me 1000 note,
the other gave me 500 note,
1000 note I lost it somewhere,
from 500 note I done shopping of 300,
rest left was 200 from which I gave 100 to the one who gave me 1000 note,
and one 100 to the other who gave me 500 note,
the one who gave 1000 was left to give rest 900
and the one with 500 was left to give 400,
900+400=1300,
300 spent on shopping so total
1300+300=1600,
now I am not getting it that I borrowed 1500, then why 1600?
if you come to know do tell me?