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WHen a Marchaunt ouersel∣leth hys marchaundise and he will giue also some part of hys ouerprice in readie money as in the ½ the ⅓ or the ¼ &c. He must substract the same part of money from the iuste price, and also from the ouerprice of his marchandise: and the two numbers that remaine after the substraction is made, shalbe that twoo firste numbers in the rule of three and the iuste price of the second marchant
shalbe y• thirde, to know how much he shal ouersel the part of his marchādise
8: Two Marchaunts wil chaunge their marchaundise the one with the other the one of theim hath fine woll at fiue pounde the hundreth, to sell for readie moneye, and in barter hee will sell it for sixe pounde, and yet hee will haue the ••/3 in readye money. The other hath clothe of 13. shillinges four pence to sel for ready money. I would knowe howe he shall sell the same in barter? Aunswere: take the ⅓ of 6 .li. whiche is the ouerprice of the 100. of wolle, and you shall haue 2. pound the whiche abate from 5 .li. whiche is the iust price of the 100. of woll and from 6 .li. which is the ouerprice, and there shal rest 3 .l. and 4 .l. for the 2 first num¦bers in the rule of thrée, then take 1••. s. 4. d. whiche is the iust price of a yarde of clothe for the thirde number: Then multiplie and deuide and you shall finde 17. shill. 9. d. ⅓. for so muche shall the seconde selle his clothe in barter.
9. More, twoo Marchauntes will chaunge their marchaundise the one with the other, the one of them hath waxe of thrée pound. 6. s. 8. d the C. to sell for readie money, and in barter he will sell the same for 4 .li. 3. s. 4. d. and yet he will haue the ¼ in ready money, and the other hath fine Crimson sat∣tine of 15. s. the yarde to sell in barter. I demaund what it is worth in ready money. Aunswere. Take the ¼ of 4 .li. 3. s. 4. d. and abate it from 4 .li. 3. s. 4. d. and from thrée pounde 6. s. 8. pencs, and there resteth 3 .li. 2. s. 6. d. and 2 .li. 5. shillinges 10. pence for the two first numbers in the rule of thrée, and 15. s for the thirde number whiche is the ouerprice of the yard of sattine. Then multiply and diuide, and you shal find 11. shillinges. And soe muche did the yarde of sattine cost in readie money.
10. Two Marchants will chaunge their marchandise the one with the o∣ther, the one of them hath tinne of 50. shillings the hundred to sell for ready
money, and in barter he wil sell it for three pounde 6. s. 8. d and he wil gaine after ten vppon the hundred, and yet he wil haue the one half in readie mo∣ney: and the other hath leade of 3. half∣pence the li. to sell for readie money. I demaund how he shall sell the pounde in barter? Aunswere: See first at tenne vpon the hundred, what the thre poūd ⅓ will come vnto, and you shall finde that they will come to 3 .li. ⅔, which is 13. s. 4. d. of the which, the halfe which he demaundeth in readie money, is 36 shillinges and 8. pence the whiche be∣yng abated from fiftie shillinges, and also from three pounde 13. shillinges four pence, there shal rest 13. shillings foure pence, and one pound sixtine. s. eight pence, for the twoo first numbers in the rule of three, whiche you muste put al into halfepence, and thre halfe∣pence for the thirde number, and then multiplye and diuide, and you shall finde 4. pence ⅛, and for so muche shall hée sell the pounde of leade in barter.
11. More twoo marchauntes will chaunge their marchaundise the one with the other, the one of theim hath steele of 16. s. 8. d. the hundred waight to sell for readie money, and in barter he wil sell it for 25. s. and yet he loseth after tenne vpon the hundred, but hee will haue the ½ in readie moneye, the other hath yron of 6. shill. 8. pence the dundred to sell in barter, I demaunde what it did coste in readye money?
Aunswere: saie if a hundred come but to 90. how muche shall 25. s. come to? Multiplie and deuide, and you shall finde 22. s. 6. d. of the whiche number, take ½ which is 11. s. 3. d. and substract it from 22. s. 6. d. and from 16. s. 8. d. and there shall rest 11 s. 3. d. and 5. s. 5. pence for the two first numbers in the rule of thrée, and 6. shil. 8. pence which is the ouerprice of a hundred of yron for the thirde number, then multiplie and deuide, and you shall finde. 3. s. 2. pence, ½4/7: and so muche did the hun∣of yron coste in readie moneye.
12. More, twoo marchauntes wyll chaunge their marchaundise, the one with the other, the one of them hath sayes of 200 shill. 10 d. the pece to sell for ready money, and in barter he wil sell the pece for 21 shillings, and he wyll haue the ¼ in readie money: The other hath cappes of 35 shill. the dosen to tell for readye money: but he wyll gayne after 10 vppon the 100. I de∣maunde howe he shall sell the same cappes in barter? Aunswere, saye, if 100 be worthe 110: What shall 35. shill. be worthe, which is the iust price of the dosen of cappes? Multiplye and diuide, and you shall fynd 38 shill. 6. d. Then take the ¼ of 25. whiche is 6 sh. 3. d. and substracte it from 20 shill. 10. d. and from 25. sh. and there shall rest 14 sh. 7. d. & 18 shill. 9. d. for the two firste numbers in the rule of three, and 38 shill. 6. d. whiche is the iuste price with his gaine of the dosen of cappes, for the thyrd nomber: then multiplie and diuide, and you shall finde 49.
shill. 6. d. and for so muche shall he sell the dosen of cappes in barter.