Here are sample solutions to the Simple Numbers exercise, submitted by fellow readers of “How to Be Strategic”. For recollection, this exercise asks you to construct a Pocket NPV for AirFriends Paris. You can send us your own sample solution by clicking here.

Are you sure you want to look at solutions yet? … Why don’t you go back to the book, and have another go yourself first? When you’re done, the sample solutions below will still be there - and they’ll be a lot more useful to you after you’ve had a go at the exercise on your own!