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

A: 57498
****
Q: ['2225', '1925']

A: 4150
****
Q: ['w', 'G', 'n', '7975', 'H', 'Q', 'G', '1863', 'L', '1407', '7733', '4065']

A:
23043
****