Masterson's arithmetick : shewing the ingenious inventions, and figurative operations, to calculate the true solution or answer of arithmeticall questions, after a more perfect, plaine, briefe, and well ordered arithmeticall way, than any other hertofore published: no lesse pleasant and profitable to those which are given to merchandizing, than all others of any profession whatsoever. Newly set forth, with brief and easie explanations of every question fully wrought out. By Humfrey Waynman, Mr. of the Lady Ramseys Free-Writing-Schoole in Christs Hospitall, London.