Panarithmologia: or, The trader's sure guide. [electronic resource] : Containing exact and useful tables, ready cast up, adapted to the use of merchants, mercers, bankers, drapers, goldsmiths, grocers, brewers, weavers, and haberdashers. And those who deal by wholesale, or retail. Also for carpenters, bricklayers, joyners, glaziers, plaisterers, plummers, corn-dealers, painters, &c. &c. And all other mechanics: as, likewise for all purchasers of houses or lands: shewing the interest of money, at 3, 3 and 1/2, 4, and 5 pounds per cent.-From one shilling to 1000 pounds:-and from one day to one year. To which is added, a table of commission, or brokage, for 1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, and 1 per cent. With tables directing how to buy and sell by the hundred: and to cast up expences by the day, week, month, and year. With a calculation of Portugal coin. A new edition, carefully corrected and enlarged. By William Leybourn.