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: ['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']

A: 36604
****
Q: ['k', '6555', 'L', '7549', 'W', 'y', 'y', '8817', 'J', 't', 'X', 'M', 'N', 'G', '7441', '283']

A: 30645
****
Q: ['8103', '8891', '467', 'u', 'J', 'd', '8111', '2441', '4015', 'r', 'a', 'K', 'g', 'K', 'u', '1867', 'K', 'Q', '9017', 'x']

A:
42912
****