I think Pearl is listed in home of Sing and Clara as granddaughter:

Name: Sing White
Age: 51
Estimated birth year: abt 1879
Birthplace: Georgia
Relation to head-of-house: Head
Spouse's Name: Clara White
Race: Negro
Home in 1930: Militia District 585, Dooly, Georgia

Amanda is listed as 20 and widowed. There are three grandchildren of Sing and Clara in the home:

Annie P - 4, Willie L 3 years 2 months and Buford, 1 yr 6 months

Denise