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: ['8871', '1297', 'W', 'f', 'Y', '8731', '113', '6707', '379', '9631', 'X', 'C', 'q']

A: 35729
****
Q: ['1203', '6179', '9835']

A: 17217
****
Q: ['219', '3793', '5649', 'B', 'D', 'i', 'H']

A:
9661
****