Step 1 : Introduction to the question "How much did a Burger King Whopper cost when first introduced in 1957?"
...The up-and-coming success of the new McDonald's franchise prompted Keith Kramer and Matthew Burns to try their hand in 1953 in the burgeoning "fast-food" industry. They obtained the rights to the Insta-Broiler burger broiler and began "Insta-Burger King in Jacksonville, FL. In 1957 they rolled out their signature creation the Whopper. Selling originally for 37 cents, ads described it as a bigger burger that could only be had at Burger King. Source: FastFoodMenuPrices.com