The price and quantity of several food items are listed below for the years 1990 and 2000. 
Compute the Laspeyres index,using 1990 as the base year.
Definitions:
Entitativity
The degree to which a group is perceived as being a coherent and distinct entity, with members sharing common characteristics or a common fate.
Uncertainty-Identity Theory
A theory suggesting that individuals form or join groups in order to reduce uncertainty about themselves and their place in the world.
System Justification Theory
The theory that negative stereotypes get attached to groups partly because they help explain and justify why some individuals are more advantaged than others.
Terror Management Theory
A theory which says that to minimize fear of mortality, humans strive to sustain faith that they are enduringly valued contributors to a meaningful world and therefore transcend their physical death.
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