The merchant and trader's daily companion. [electronic resource] : Containing, I. Exact useful tables, shewing the value of any quantity of goods or wares, ready cast up, more adapted to merchants use, than any other extant. Calculated by an ingenious accomptant. II. Table of exchange. In two parts. I. English money exchanged into Irish. 2. Irish money exchanged into English. Each by addition only, for any sum from 300 pounds to 1 penny, and at the several rates, whether quarters or eighths, from five per cent, to eleven per cent. With an appendix of exchange at Par. III. Tables of commission at the several rates mostly used in Ireland. IV. An index to interest. Containing tables of simple interest, at 4, 5, and 6 per cent. from 1 Day to 30 days; for 40, 50, 60, 70, 80, 90 days; for 3, 6 and 9 months; and for 1 year. To all which is prefixed, the new table of coin, as the same was made current by the lords justices proclamation from the 8th day of July, 1751. Together with a table of the number of yards in the several scores of linen, from 1 to 150. The tables of exchange, commission, and coin, calculated originally: all the other tables cast up in manuscript, and the whole work carefully corrected.