400 apples were bought at ₹1200 per

400 apples were bought at ₹1200 per hundred and were sold at a profit of ₹800. Find the selling price (in ₹) per dozen of apples.
₹1200 प्रति सैकड़ा की दर से 400 सेब खरीदे गए और ₹ 800 के लाभ पर बेचे गए। प्रति दर्जन सेबों का विक्रय मूल्य (₹ में) ज्ञात कीजिए।