If books bought at prices ranging from Rs. 130 to Rs. 320 are sold at prices ranging from Rs. 210 to Rs 310, what is the greatest possible profit that might be made in selling 18 books ? Choose the correct choice from the following choices:
A) Rs. 2500 B) Rs. 3000 C) Rs. 3500 D) Rs. 3240 E) Rs. 3600
The greatest profit is possible only if the cost price of the books are minimum and selling prices are maximum.   Let lowest cost price of the 18 books = 130*18 = Rs. 2,340   Maximum selling price of 18 books = 310 *18 = Rs. 5,580   So, maximum profit = 5580 - 2340 = Rs. 3,240   ANSWER : OPTION Rs. 3240
<result>D</result>
If books bought at prices ranging from Rs. 130 to Rs. 320 are sold at prices ranging from Rs. 210 to Rs 310, what is the greatest possible profit that might be made in selling 18 books ?