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: ['G', 'e', 'R', '4427', '3401', '3065', 'I', '2781', '6829', '5261']

A: 25764
****
Q: ['6165', 'x', 'u', 'n', 'V', 'B', '4039', 'l', '991', 'x', '335', '9011', 'K', '8725', 'a', '6291', 'j']

A: 35557
****
Q: ['t', 'Q', '9527', '1851', 'r']

A:
11378
****