In the context of the production era, the "hard sell" refers to the aggressive persuasion designed to separate consumers from their cash.
Step-by-step explanation:
During the time of production era, the production of goods and services were increased. Hence the prices of these goods and services were reduced. The main aim of the production era was to reduce the cost related to the manufacturing process.
In the time of production era, the business gained profit and the cost related to the production of products were reduced. The term "hard shells" in the context of production era refers to the aggressive attraction that is made for separating consumers and their cash.