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: ['J', 'S', 'S', 'U', 'w', '7691', '7529', 'B', '3861', '4557', 'd', '569', '1547']

A: 25754
****
Q: ['597', 'i', 'd', '3201', 'u', '1111', '8563', 'c', 'E', '5983', '6293']

A: 25748
****
Q: ['g', '8469', '5923', '4857']

A:
19249
****