Answer:
For a better valuation of trade.
Step-by-step explanation:
Mackay could have left out this list and simply said that the root cost 2500 florins. But he gave the list to have a better understanding of the valuation of trade. Now, the cost could have simply being layed out. But then this list helped helped to give a better perspective of the valuation of the bulb and also how it could be used to replace money