In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.

Q: ['S', 'D', '3101', '4967', '8197', '5025', '4257', 'S', 'X', '7641', 'n', '6775', '4719', 'o', '2821', 'x', '5605', '2181']

A: 55289
****
Q: ['z', 'T', 'Y', 's', 'j', '585', '7833', '2601', '8057', 'S', '7037', '5799', '4477', '5377', '6301', 'P', 'm', '9431', 'f']

A: 57498
****
Q: ['q', 'x', 'L', 'I', 'P', '669', '8051', 'n', '7285', '6605', 'V', '3459', 's', '1987', 'B', '5211', 'a', 'o', 'Y', '9063']

A:
42330
****