128 De libris \({1 \over 2}\) 8 venditis pro soldis³²⁷

Item libre \({1 \over 2}\) 8 pro soldis \({3~~2 \over 4~~12}\) 11; quantum veniunt rotuli \({1~~3 \over 2~~8}\) 9? Fac de

⓪ 539 17 ③ s. can. \({3~~\phantom{1}2 \over 4~~12}\) 11 \({1~~\phantom{15}8 \over 2~~158}\) pensa est 0 per 7 151   ④ \({1~~1~~\phantom{1}8~~\phantom{1}5~~\phantom{1}6~~\phantom{1}8 \over 2~~8~~10~~10~~17~~12}\) 19 \({1~~3~~\phantom{10}9 \over 2~~8~~100}\)

³²⁸ libris \({1 \over 2}\) 8 partes unius cantarii; erunt \({1~~\phantom{1}8\phantom{1} \over 2~~158}\), et de rotulis \({1~~3 \over 2~~8}\) 9 fac similiter partes cantarii; eruntque \({1~~3~~\phantom{1}9\phantom{1} \over 2~~8~~100}\). Et³²⁹ describe questionem, et multiplica 8 que sunt super 158 per 2 et adde 1; erunt 17, que pone super \({1~~\phantom{1}8\phantom{8} \over 2~~158}\), et multiplica 11 per 12 et adde 2, que per 4 et adde 3; erunt 539, que pone super \({3~~\phantom{1}2 \over 4~~12}\) 11. 129 Adhuc multiplica 9 que sunt super 100 per 8 et adde 3, que per 2 et adde 1; erunt 151, que pone super \({1~~3~~\phantom{1}9\phantom{1} \over 2~~8~~100}\). Et multiplica 151 per 539: erunt 81389, que deberes multiplicare per 2 et per 158 que sunt sub virgula sub 17 et dividere per eadem³³⁰ 17 et per ruptos aliarum virgularum. 130 Sed relinques multiplicationem de 2 que sunt post 158 in virgula et multiplica[S:46v]tionem de 2 que sunt in 158, sed multiplica³³¹ [G:68v] tantum³³² 81389 per medietatem de 158, scilicet per 79, et pro ipsis 2 et 2³³³ per que non multiplicasti relinques³³⁴ quod non divides per 4 que sunt in virgula post 12. Multiplicatio enim de 81389 per 79 est 6429731, quibus divisis in \({1~~0~~\phantom{1}0~~\phantom{1}0~~\phantom{1}0~~\phantom{1}0 \over 2~~8~~10~~10~~17~~12}\), exibunt soldi \({1~~1~~\phantom{1}8~~\phantom{1}5~~\phantom{1}6~~\phantom{1}8 \over 2~~8~~10~~10~~17~~12}\)³³⁵ 19.