The cost prices of two articles A and B are in the ratio 4: 5. While selling these articles, the shopkeeper gains 10% on article A and 20% profit on article B, and the difference in their selling prices is ₹480. Find 30% of the total cost price (in ₹) of both the articles.

 810

               A                      B

CP           4                      5  

ATQ,

SP          4.4                   6    = Difference = 1.6

                                                                 ⇓×300

                                                                480

Total CP = 9x = 9 × 300 = 2700

30% of the CP = 30% of 2700 = 810