CEVAP:

A simple aggregate price index is simply based on accumulating the unit prices of several commodities in different periods. As the name suggests, in this index one looks at the total price of the products in a basket and makes a comparison of this total with another period or with a base period. Therefore, this index will show us the difference of the total price paid to the products in the basket from one period to another period. During the period, the price of some items may be increased while the price of others is decreased, the investigator does not consider the changes in the item price but s/he is interested in the total price change of the products. This index requires the prices of each product in the basket from one period to the other if the price of an item is missing in one period, then the simple aggregate index should not include this item in the final calculations.