Go to the link in post #528 and scroll down to the illustration of a calculator screen and you will see that you are wrong.
Why do you choose to argue with an award-winning math instructor?
Because the answer is 288 because the math problem is incorrectly written which leads to an ambiguous answer.
Besides, even your award-winning math instructor admits on the same page that you link that his method is not the end all be all:
“please do not send me an e-mail either asking for or else proffering a definitive verdict on this issue. As far as I know, there is no such final verdict. And telling me to do this your way will not solve the issue!”
Ergo, 288!
:)
Cheers