Sangeeta sold a saree at a profit of 15%. If she had bought the saree at 10% less and had sold it at Rs.400 more compared to the previous selling price, she would have gained 33.33% profit. What is the basic cost price of saree?

• A. Rs. 7,600
• B. Rs. 8,000
• C. Rs. 7,500
• D. Rs. 8,400