Simplify the following text for a Grade 10 native English-speaking person.
Original: The first vocals for the song were added on 5 August , additional vocals and guitar overdubs were added on 7 August , and bass and drums on 8 August , the day the Abbey Road cover picture was taken .
Simplified: The first vocals for the song were added on August 5 , more vocals and guitar overdubs were added on August 7 , and bass and drums on August 8 , the day the Abbey Road cover picture was taken .