Could have been about the cost of NAAFI biscuits...made no odds.
I remember the day an RAF officer was trying to tell our 2 Star that MRA4 was NOT on target (as the 2 Star had claimed), it had just slipped 4 years. The 2 Star (Director General Air Systems 2) dismissed him and turned to a more pressing matter. The cost of bananas in the Abbey Wood canteens.