The Laspeyres price index is calculated by the ratio of the sum of prices in the current period to the sum of the prices in the base period, these sums are weighted by the respective quantities of the base period. In this case, the weights which are used are the quantities of each commodity in the base period. When the Laspeyres quantity index is calculated, the price is the weight in the base period. In the calculation of the Paasche price index, the current period quantities are used as weights, so it is also known as the current year weighted index. When the Paasche Quantity Index is constructed, the price is the weight in the current period. The correct answer is C.