$15.3 million? Oh, never mind

Mint officials double-counted some gold bullion they sold, and also underestimated the shrinkage of the gold during processing.

Well, OK then. And you know those taxes I'm supposed to be paying you next April? Well, there's gonna be a little shrinkage, just a few bookkeeping errors really, but don't you worry boys, you'll get most of it, I'm sure...