Answer: Production era
Explanation: the production era, covered the early years of the United States up until the 1920s (1860s - 1920s). It was an era characterised by the production of goods in mass and at very low costs. During the production era in United States business history, goods were extremely scarce with buyers willing to accept virtually any goods that were produced and make do with them as best they could. This is exactly the case with the shoemaker knowing that customers would buy his shoes even if they just "sort of" fit.
The main significant idea was that products would sell themselves (thus increasing profitability), which made the major concern of businesses and firms to production, and not marketing.