The cost of manufacturing an article rose by 18% a result of the increase in the cost of raw material A manufacturer revised the selling price of the article so as to maintain the same profit percent as before. However, he found that he now got Rs.9 more than the earlier profit by selling each article. What was the earlier profit per article? a. `R s .36` b. `R s .45` c. `R s .50` d. `R s .54`