Directions: Given table below shows the data about the cost price, the marked price, and the selling price of 4 articles (A, B, C, and D) sold by a trader.

Articles Marked Price (Rs.)       Selling Price (Rs.)     Cost Price (Rs.)

A          X² - Y² + XY - 225              Y 2                        4X + 5Y + 120

B          X² + 12Y + 7X + 160          X² + Y² + 75          2Y²

C          (Y/2)³                                 Y² + XY - 5Y           XY

D          2XY - 10Y                          XY + 100                Y² 

Note: The profit made on article D is Rs. 200 and the discount offered on article C is 20%.