At what price must kashif sell a mixture of 80 kg sugar at Rs. 6.75 per kg with 120 kg at Rs. 8 per kg to gain 20%?

A. Rs. 7.50 per kg
B. Rs. 8.20 per kg
C. Rs. 8.85 per kg
D. Rs. 9 per kg
Explanation:
C.P of 200 kg of sugar = Rs. (80 × 6.75 + 120 × 8) = Rs. 1500
C.P of 1 kg = Rs. (1500/200) = Rs. 7.50
Gain required = 20%
S.P of 1 kg = (120% of Rs. 7.50)
= Rs. (120/100 × 7.50) = Rs. 9 per kg