There were just six weeks to develop it.
And the concepts where developed before by public research institutes for a tiny fraction of that price (not included).
(If you insist, here is a small calculation. Let‘s say we charge a whopping 500 Euros per hour per engineer. In other words an engineer that costs 1 million per year. And we have 6 weeks time which was all they had. And let’s take 20 people for that. And let‘s add 500.000 for some overhead. Then that‘s still just about 3 million. And I‘ve used insane numbers for a product that trivial.)