Answer:
160
Explanation:
Given: CPI basket contain 400 oranges and 800 pens.
In the base year, price of oranges is $1 and pen is $0.75.
This year urban customer buy oranges at $2 each and pens at $1 each.
To find consumer price index (CPI), we need to check price of basket in current year and base year.
∴ Current year´s price for 400 oranges and 800 pens = 
Now, adding the price to get cost of basket
Cost of basket in current year= 
Base year´s price for 400 oranges and 800 pens= 
Cost of basket in base year= 
Next, calculating the CPI of this year
Formula; CPI= 
CPI for the year = 
∴ Consumer price index (CPI) = 160.