Andrew purchased 11kg of grapes at the rate of 98 per kg and 7 kg of mangoes at the rate of 50 per kg. How much amount did he pay to the shopkeeper?  Options:
A) 1000
B) 1055
C) 1428
D) 1500
E) 1080

Rationale: "cost of 11 kg grapes = 98 × 11 = 1078 . cost of 7 kg of mangoes = 50 × 7 = 350 . total cost he has to pay = 1078 + 350 = 1428 c"
Answer: C