βThe moment Dad wrote the $14 aircon month into the ledger, it stopped being invisible.β
From Middle English leggen, to lay down β the same word as lay. A ledger is where the numbers are laid down in rows, in one fixed place, so the story cannot change later.
Write today's three guesses and the real bill numbers on one page, and keep it. Guess again next month and compare the two.
π¬ What is one thing this family paid for this week that never got written down anywhere?