So if they said a total of $240 that's for the whole account unless you have more than one stateroom. If they said per person, then the main account would get a credit of $480. I would bet that its up to $240 per stateroom.
Jim, I didn't see your post before I replied. You are correct, the amount is up to $240 per stateroom total. The amounts are suppose to be per person in the same stateroom to add up to that potential figure.