Sometimes the advertisements in the newspaper tell a story as interesting as the articles. Here are two examples from May of 1921:
No Pay- No Gas
Hereafter we must have SPOT CASH for all gas, oil, repairs, tires, or labor- one and all alike.
The small margin of profit makes this necessary.
You'll like the cash system better yourself after you try it.
Pay Cash- Pay Less
Conditions make it necessary for us to adopt the Strictly Cash on Delivery plan; so hereafter we will not make tickets for gas or oil, repair parts or labor. It is strictly CASH to everyone alike, and by this means we well be able to make prices considerably less.
Craghead Bros. Garage