A person working in sales department draws Rs. y as basic salary. Further he gets 10% as commission for every penny more than 1 lakh brought in as sales. He also gets 20% as bonus for every penny more than 2 lakhs he brought in as sales. For a particular sales amount, he receives Rs. 50000 as total salary whereas he would have received only Rs. 15000 for half the sale amount. What is the value of y?

• A. 10000
• B. 15000
• C. 18000
• D. 20000
• E. 24000