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: ['V', '8137', 'b', 'k', '2081', 'L', '9733', '7525', 'D', '2381', 'O']

A: 29857
****
Q: ['A', '9979', '8723', '1131', 'i', 'p', 'M']

A: 19833
****
Q: ['O', '4559', '2111', '159', 'r', '4017']

A:
10846
****