In which format did this type of music retail outlet, such as Bull Moose Music, sell music?
Record shop: A record shop or record store is a retail outlet that sells recorded music. Record shop:  In the late 19th century and the early 20th century, record shops only sold gramophone records, but over the 20th century, record shops sold the new formats that were developed, such as eight track tapes, compact cassettes and compact discs (CDs).
i don't know