My bad I though it was 16 boxes.....4 sleeves of 4 boxes.Last I checked, a "case" was also called a "flat" and held (10) boxes. It makes the math easier, but less good, $-wise.
As for Trap shooters being cheap bastids that spend $$$$ on a gun, then complain about the price of ammo.....I shoot an old, $300 Browning A5 for registered targets! Does that give me more, or less reason to whine?