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: ['6367', '9923', '9141']

A: 25431
****
Q: ['Q', '1767', '5523', 'I', '933', 'h', '2189', 'f', '7795', 'X', 'M', 'G', '1215', 'W', '8619']

A: 28041
****
Q: ['o', '7099', 'G', 'v', 'H', 'J', 'k', '1607', 'i', '9765', '2489', '8031']

A:
28991
****