There are some things you just don't want to calculate the cost of. The amount you spend on booze every year, for example. Or, more painfully, the quids that go straight out of your pay packet and into the taxman's coffers.
So how many wannabe Formula 1 drivers (and their dads) have sat down with a sharpened pencil and totted up the figure - should they have the talent, luck and timing - that it's going to cost to land a grand prix drive? Whatever the number, that doesn't matter, because we're going to do it for them.
Truth be told, we've already been through several pads of A4 trying to figure it out. It's an extremely difficult calculation and will vary from driver to driver depending on the route taken to the top. But give or take a few hundred thousand - almost loose change in this equation - we've arrived at a rough guide for the amount of cash it could cost a driver to reach F1.