A grocer purchased 80 kg of sugar at 13.50 per kg and mixed it with 120 kg sugar at 16 per kg. At what rate should he sell the mixture to gain 19%?	Choose the correct choice: A) 17 per kg B) 17.85 per kg C) 16.5 per kg D) 16 per kg E) None of these
C.P. of 200 kg of mixture = (80 × 13.50 + 120 × 16)   = 3000.   S.P. = 119% of 3000 = (119⁄100 × 3000) = 3570   ∴ Rate of S.P. of the mixture = (3570⁄200) per kg   = 17.85 per kg.   Answer 17.85 per kg
<result>B</result>
A grocer purchased 80 kg of sugar at 13.50 per kg and mixed it with 120 kg sugar at 16 per kg. At what rate should he sell the mixture to gain 19%?