OPERATION. 6) 840 Ans. 140 barrels. ANALYSIS. Since $6 will buy 1 barrel of flour, $840 will buy as many barrels as there are dollars, or as many barrels as $6 is contained times in $840; 840÷6 140 barrels. RULE. Divide the cost of the quantity by the price of one. EXAMPLES FOR PRACTICE. 2. How many dozen of eggs can be bought for $5.55, if one dozen cost $.15? Ans. 37 dozen. 3. At $12 a ton, how many tons of hay can be bought for $216? Ans. 18 tons. 4. How many bushels of wheat can be bought for $2178.75, if 1 bushel cost $1.25? Ans. 1743 bushels. 5. A dairyman expends $643.50 in buying cows at $19 apiece; how many cows does he buy? Ans. 33 cows. 6. At $.45 per gallon, how many gallons of molasses can be bought for $52.65? 7. A drover bought horses at $264 a pair; how many horses did he buy for $6336? 8. At $65 a ton, how many tons of railroad iron can be bought for $117715 ? Ans. 1811 tons. CASE V. 172. To find the cost of articles sold by the 100, or 1000. 1. What cost 475 feet of timber, at $5.24 per 100 feet? RULE. I. Reduce the given quantity to hundreds and decr mals of a hundred, or to thousands and decimals of a thousand. II. Multiply the price by the quantity, and point off in the result as in multiplication of decimals. The letter C is used to indicate hundreds, and M to indicate thousands. EXAMPLES FOR PRACTICE. 2. What will 42650 bricks cost, at $4.50 per M? Ans. $191.925. Ans. $21.156. 3. What is the freight on 2489 pounds from Boston to New York, at $.85 per 100 pounds? 4. What will 7842 feet of pine boards cost, at $17.25 per M ? Ans. $135.274. 5. What cost 2348 pine-apples, at $12 per 1000 ? 6. A broom maker bought 1728 broom-handles, at $3 per 1000; what did they cost him? 7. What is the cost of 2400 feet of boards, at $7 per M; 865 feet of scantling, at $5.40 per M; and 1256 feet of lath, at $.80 per C? Ans. $31.519. 8. What will be the cost of 1476 pounds of beef, at $4.371 per hundred pounds? CASE VI. 173. To find the cost of articles sold by the ton of 2000 pounds. 1. How much will 2376 pounds of hay cost, at $9.50 per ton? Give second explanation. Rule, first step. Second. Case VI is what? OPERATION. 2) $9.50 $4.75 2.376 $11.28600 ANALYSIS. Since 1 ton, or 2000 pounds, cost $9.50, 1000 pounds, orton, will cost of $9.50, or $9.50 ÷ 2 = $4.75. One pound will cost Tobo, or .001, of $4.75, and 2376 pounds will cost 2376 or 2.376 times $4.75, which is $11.286. 1000 RULE. I. Divide the price of 1 ton by 2, and the quotient will be the price of 1000 pounds. II. Multiply this quotient by the given number of pounds expressed as thousandths, as in Case V. EXAMPLES FOR PRACTICE. 2. At 7 a ton, what will 1495 pounds of hay cost? Ans. $5.2325. 3. At $8.75 a ton, what cost 325 pounds of hay? Ans. $1.421. 4. What is the cost of 3142 pounds of plaster, at $3.84 per ton? Ans. $6.032. 5. What is the cost of 1848 pounds of coal, at $5.60 per ton? 6. Bought 125 sacks of guano, each sack containing 148 pounds, at $18 a ton; what was the cost? 7. What must be paid for transporting 31640 pounds of railroad iron from Philadelphia to Richmond, at $3.05 per ton? Ans. $48.251. BILLS. 174. A Bill, in business transactions, is a written statement of articles bought or sold, together with the prices of each, and the whole cost. Find the cost of the several articles, and the amount or footing of the following bills. Give explanation. Rule. What is a bill? Explain the manner of making out a bill (4.) Messrs. OSBORN & EATON, ST. LOUIS, Oct. 15, 1878. Bo't of ROB'T H. CARTER & Co., 20000 feet Pine Boards, @ $15.00 per M. 1. What will 62.75 tons of potash cost, at $124.35 per ton? Ans. $7802.9625. 2. What cost 15 pounds of butter, at $.17 a pound? Ans. $2.55. 3. A cargo of corn, containing 2250 bushels, was sold for $1406.25; what did it sell for per bushel? Ans. $. |