People used installment plans to make purchases.
Step-by-step explanation:
The economic prosperity of 1920s made the new patterns for the consumers as in this period number of consumer good (radio, cars, vacuum, makeup products and etc.) took place in the market. The expansion of credit helps the consumers to buy more consumers goods such as car and other expensive things.
Apart from this, the consumer purchasing innovation (installment and credit store) helped out the people in purchase of the expensive things which were out of their reach earlier