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Urgent help needed for calculating cost of living index

**PLEASE CHECK ATTACHED FILE FOR MORE INFORMATION**

PLEASE HELP ME. THANKS IN ADVANCE.

CALCULATE COST OF LIVING INDEX FROM THE FOLLOWING INFORMATION:

COMMODITIES: Percentage of Expenditure: Prices:

2009: 2010:

A 35 150 145

B 10 25 23

C 20 75 65

D 15 30 30

E 20 40 45

Re: Urgent help needed for calculating cost of living index

excuse my ignorance, but is there a definition or method/formula for calculating the cost of living index?

Re: Urgent help needed for calculating cost of living index

yes, but in order to apply formula, i need to find out value of q (not) i.e, quantity.

Re: Urgent help needed for calculating cost of living index

Pretend that the total expenditure is X and then find the value of the index.

You will find that the X's cancel...you should probably check you understand why.