We need a friendly bean-counter.
It would be very interesting to know the financial cost to Virgin, not just in dollars out laid but also dollars lost, the dollars worth of time and effort that will go into the ensuing investigation, and the dollar amount of the publicity I've the issue, and then equate the sum of all these dollars with the volume of fuel it would buy.
In other words, by saving a little on flight fuel burn by not carrying an alternate, how much have they lost?