Lowering the price of the product, and selling as many as possible was the focus of companies in the sales marketing era. The price mattered more than anything else because after the great depression, nobody could afford to buy anything.
The philosophy of the sales marketing era is: If you create a product thats too expensive for its quality, people won't buy your product. When the great depression occurred, around 25% of people were unemployed. This meant that if a product were to be sold, it must be very cheap for consumers to buy.