Session03

Hello Chris,

I finished (I believe) the mailroom assignment. Would you mind taking a look at it and let me know what you think?

Thanks a lot!

Michel.

PS: Thank you very much for the help with git & github today.
Ah -- I see -- the 75 is the total. but no need for it to be a one-element list, rather than on it's own. Also, be carful about storing values that can be calculated for other data -- yu then need to make sure they don't get out of sync.