The following table gives the cost of living index for 1998 with 1986 as base for different commodity groups: Food, Clothing, Fuel and Light, Rent and Miscellaneous as 440, 500, 350, 400 and 250 respectively with their weights in order in the ratio 15: 1:2:3:4. Obtain, the overall cost of living index number, suppose a person was earning $ 4,000 in 1986. What should be his salary in 1998 to maintain the standard of living as in 1986?

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