Soon afterwards it was drawn on by the author of Libro che tracta di mercatantie et usanze de' paesi, compiled in 1458 probably by Giorgio Chiarini, afterwards incorporated in Luca Pacioli's Summa de arithmetica.
This idea was later illustrated by the author of Libro che trattasi di mercantie et usanze de' paesi, compiled around 1458 probably by Giorgio Chiarini, and eventually became part of Luca Pacioli's Summa de arithmetica.