A man buys two chairs for a total cost of Rs. 800. By selling one at 3/4 of its cost price and the other at 4/3 of its cost price, he loses Rs. 25. What did he pay for the chairs?

• A. Rs. 500, 300
• B. Rs. 400, 400
• C. Rs. 600, 200
• D. Rs. 700, 100