Drag a note into the ledger, or click a note and then click an empty box.
Fill the lines in any order. A line locks only when all three boxes are right; you'll be told how many are right, not which.
London's ledger is closed, but the account is not. Of the 4½d paid for a pound of sugar, 1.75d never reached London: it stayed on the far side of the Atlantic. Seven of her eighteen farthings are still on the counter. Your ledger now has a new column: Labour. The last line of that column has no name.