A trader charges Rs.15 per kg. 70 kg at the rate of Rs. and Rs.18.50. per kg. 30 kg at the rate of Rs. buys tea. If the packing charge is 2 percent, then at what rate should he sell the mixture to make a profit of 15 percent?

• A. 18 रूपये प्रति किग्रा.
• B. 18.80 रूपये प्रति किग्रा.
• C. 17.80 रूपये प्रति किग्रा.
• D. 18.50 रूपये प्रति किग्रा.