Question: Which of the following scenarios represents a decrease in purchasing power? A firm buys 100 pounds of salt each year and pays the same amount each year. A firm buys 100 pounds of salt one year, then buys 125 pounds of salt the next year, and pays the same amount each year. A firm buys 100 pounds of salt each year and pays less each year. A firm buys 100 pounds of salt each year and pays more each year.