The data below shows prices and quantities of commodities consumed by a household in 2021 and 2022. 2021 2022 Item Price Quantity Price Quantity Printing paper 1.54 80 1.65 72 Envelops 2.00 35 1.75 40 Pens 0.58 15 0.62 15

Using 2020 as the base year,

calculate the following indices interpreting your result in each case:

a) Laspeyres Quantity Index (LQI)

b) Paasche Quantity Index (PPI)

c) Fisher Price Index (FPI)