The sale price of an article including the sales tax is616. The rate of sales tax is 10%. If the shopkeeper has made a profit of 12%, then the cost price of the article is : Choose the correct answer.
A) 500  B) 515  C) 550  D) 600  E) None of these
Sol.(a) Let the CP of the article be x   Then, SP = x × 1.12 × 1.1   Now, x × 1.12 × 1.1 = 616   =&gt; x = 616⁄1.232 = 500 500nswer 500
<result>A</result>
The sale price of an article including the sales tax is616. The rate of sales tax is 10%. If the shopkeeper has made a profit of 12%, then the cost price of the article is :