Answer:
A market economy is an economic system in which the decisions regarding investment,productions and distribution are guided by the price signals created by the forces of supply and demand
Kings/Queens
Nobles
Peasants
Serfs
If priest/clergy is in your topic...
Church
Kings/Queens
Nobles
Peasants
Serfs
Do some chores and ask your mom for money for doing them and use her card and buy some
2 cups=1 pint
so
4 cups=2 pint