Answer:
b. 116
Step-by-step explanation:
The calculation of Consumer Price Index is shown below:-
CPI = ((Base year basket quantities × current year price) ÷ (Base year basket quantities × Base year prices)) × 100
= ((50 × $1.50) + (100 × $1.10)) ÷ ((50 × $1.20) + (100 × $1.00)) × 100
= (185 ÷ 160) × 100
= 115.6
0r 116
So, for computing the consumer price index for 2018 we simply applied the above formula.