Note the differences in price between types of salt products, vendors, quantities and whether it is in bulk or packaged form. Ask students for possible explanations for such price differences. To get a better idea of why differences in price exist between the types of salt products, students should think about production processes, packaging, energy costs and shipping methods and distances. Have the students write a paragraph about the different production processes and the pricing of salt. For example, table salt undergoes more production processing steps than deicing salt.
Conclusion Have a class discussion about the principles of supply and demand.
Price differences exist between salt bought in large bulk quantities and salt bought in small quantities and in packaged form.