The scales of commerce and trade: ballancing betwixt the buyer and seller, artificer and manufacture, debitor and creditor, the most general questions, artificiall rules, and usefull conclusions incident to traffique: comprehended in two books. The first states the ponderates to equity and custome, all usuall rules, legall bargains and contracts, in wholesale ot [sic] retaile, with factorage, returnes, and exchanges of forraign coyn, of interest-money, both simple and compounded, with solutions from naturall and artificiall arithmetick. The second book treats of geometricall problems and arithmeticall solutions, in dimensions of lines, superficies and bodies, both solid and concave, viz. land, wainscot, hangings, board, timber, stone, gaging of casks, military propositions, merchants accounts by debitor and creditor; architectonice, or the art of building. / By Thomas Willsford Gent.

QUESTION VI. At the term of 6 moneths A is to pay unto B 500 l, but do agree in receiving it presently upon discount, af∣ter the rate of 6 L per cent. per ann. what summe of money will discharge it?

In the second table (for discount of money) I find the decimal for 6 moneths .971286, which fra∣ction of 1 L Sterling multiplied by 500 L, or 5 the product will be 4856430, to which annex 2 ci∣phers, the number will be 485,643,000; from the

right hand cut off 6 places, and reduce the fracti∣on, there will appear 485 L 12 sh 10 ¼ d, the true summe upon rebate, that will discharge 500 L 6 moneths before tis due, which according to the best vulgar custom comes near the truth, as by Pro. 47 of this book (the discount being but for a short time) viz. 485 L 8 sh 8 d 3 q.