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: ['h', '9539', '3373']

A: 12912
****
Q: ['l', '5369', 'z', 'U', 's', '2357', '3367', 't', '6539', 'K', 'a', 'Q', 'x', 'e', '6459', 'K', 'B', 'f', 'j']

A: 24091
****
Q: ['8191', 'q', 'k', 'z', 'R', '1325', 'j', 'W', '1249', 'c', 'E']

A:
10765
****