Simplify the following text for a Grade 9 native English-speaking person.
Original: Epstein paid for The Beatles to record a demo in Decca 's studios , which Epstein later persuaded George Martin to listen to , as Decca was not interested in signing the band .
Simplified: Decca gave Epstein a copy of the band 's demo ( demonstration ) tape , which he used to promote them , but could not find anyone interested .