So the calculations are so simple you won't share them? It sounds like you're worried someone will find a mistake in your simple calculations.
They are simple enough for you to do, so do them and then come back and tell me that I'm wrong. I have given you enough information that, if I am wrong, you will be able to simply refute my end figures by you doing the calculations.
Consider it an exercise in helping you practice appropriate mathematical processes.
I should add that it took me about half an hour to collect the relevant information and do the calculations.