So for a, you it asks you to do -12.58 - 30.72 (do KCC, which is Keep Change Change) So now you have -12.58 + (-30.72) which is $43.30
(B and C are pretty much the same question but okay)
B asks you to remove 25 from what you got from a, which is (-43.30 - 25 =) -68.30
C is the same answer as B cause -68.30 + 68.30 is canceling each other, making it 0. So, deposit $68.30 into your account.
Hope this helps!!!
