Everything started with 35$

"The SWOOSH logo is a graphic design created by Caroline Davidson in 1971. It represents the wing of the Greek Goddess NIKE. Caroline Davidson was a student at Portland State University in advertising. She met Phil Knight while he was teaching accounting classes and she started doing some freelance work for his company. Phil Knight asked Caroline to design a logo that could be placed on the side of a shoe. She handed him the SWOOSH, he handed her $35.00. In spring of 1972, the first shoe with the NIKE SWOOSH was introduced.....the rest is history! "

Via Nike Consumer Affairs packet, 1996