The table shows the averages prices of c...

The table shows the averages prices of coffee, sugar and milk in 1979 and 1980, and the weights used to calculate the cost of making a cup of coffee,

C:alculate, correct to one decimal place, the index number for the cost of a cup of coffee in 1980 using.
(i) weighted price relatives, (ii) weighted aggregates
taking the index number for 1979 as 100 in each case.

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