## Mathematics: Toolkit Introduction

Michael used many different tools for diverse tasks. Many of the items in his toolkit were mathematical. In fact, mathematics takes up more of his manuscript than any other subject.

A characteristic feature of Michael's mathematics is the statement and solution of practical commercial problems. By stating problems and writing out their solution, Michael provided himself with a reference text he could use whenever he needed to remember a particular method. The very first page of his manuscript contains a commercial problem concerning a cargo of pepper.

Michael typically provided multiple solutions to each problem, using two or three of his favorite mathematical tools. Follow Michael as he determines the value of a cargo of pepper using: