Vikash sold two-fifth of books at 25% profit, one-fifth of the books at 20% profit and the remaining number of books at 5% of the profit. If the total profit earned by Vikash is Rs. 3200, then the cost price of all books.
1
Rs. 15,000
2
Rs. 10,000
3
Rs. 5,000
4
Rs. 20,000