Ledger Hall

An economics and accounting lecture on a saturated banknote-green field: paper ledger panels ruled in green, a high-contrast institutional serif for headings, tabular monospace for every figure, journal line and formula, one red for debits and losses, black-ink banknote engravings with a single green spot, and native T-accounts, journal tables, worked-example ladders, comparison tables, curves, a flow chain and two live calculators the room can read from the back row and edit afterwards.