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: ['O', '6337', 'j', '6009', 'z']

A: 12346
****
Q: ['t', '7469', 'Y', 'N', '8137']

A: 15606
****
Q: ['9487', '8795', '8209', '5135', '8119', 'v', 'q', '4197']

A:
43942
****