In all cases, the price must first be divided into a number of parts, each of which is a simple fraction[47] of some one which goes before. No rule can be given for doing this, but practice will enable the student immediately to find out the best method for each case. When that is done, he must find how much the whole quantity would cost if each of these parts were the price, and then add the results together.
EXERCISES.
What is the cost of
243 cwt. at £14 . 18 . 8¼ per cwt.?—Answer, £3629 . 1 . 0¾.
169 bushels at £2 . 1 . 3¼ per bushel?—Answer, £348 . 14 . 9¼.
273 qrs. at 19s. 2d. per quarter?—Answer, £261 . 12. 6.
2627 sacks at 7s. 8½d. per sack?—Answer, £1012 . 9 . 9½.
231. Throughout this section it must be observed, that the rules can be applied to cases where the quantities given are expressed in common or decimal fractions, instead of the measures in the tables. The following are examples:
What is the price of 272·3479 cwt. at £2. 1. 3½ per cwt.?
Answer, £562·2849, or
£562. 5. 8¼. 66½lbs. at 1s. 4½d. per lb. cost £4. 11. 5¼.