accounting

[sharpwings]

I have a doubt in paper 1 (new pastpapers) june 010 varient 12, in question 1c. It's written in the mark scheme that the amount required to restore the imprest is $50 ! Although the fixed amount is $300 and $150 was drawn from bank so it's now $450 with the petty cashier who paid $400 for the expenses which means that only $50 left with the petty cashier and to restore it, $250 is required. May someone please explain it to me?
Thanks in advance.

 

[Islam elsayed]

it is a mistake in the markscheme like many other mistakes found