Mint Delivery Tray
thingiverse
On my copy of the game, the cardboard chits were a little too big for the tray by FixingKitty https://www.thingiverse.com/thing:3094427 I edited it to make the slot a little wider in Tinkercad. I still had a little trouble closing the box, but moving the tray around a few times let me get it shut.
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