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: ['3705', '9217', 'C', '4609']

A: 17531
****
Q: ['v', '9511', 'f', 'q']

A: 9511
****
Q: ['8237', '2137', '9485', '7675', 'w', 'G', 'C', 'a', 'q', 'a', 'y', '7011', 'e', '5963', '3447']

A:
43955
****