LIT CASHIER keeps a coin only when its value still fits the remainder. 87 cents is 3 quarters, 1 dime, 0 nickels, and 2 pennies. Six coins are kept and four oversized offers are dropped. No other mix of these coins pays 87 with fewer than six. The law sums to 7. A second run must match.
AMBER The set is the ordinary United States denominations of 1, 5, 10, and 25 cents. That assignment is the coin drawer on this page.
WALL The fewest-coin check is for 87 cents and these four values. It does not say every coin system rewards the greedy choice.
MODEL One pupil. The stage is the drawer the pupil filled. A coin is kept only when it fits. No cartridge is loaded.
Checking the teller.
Seal sha256(name|slug|blurb): e4ef2c8977a05368fb22f3166aa867923ae96cdc24ebbbce6aedf57c5b3e3efc