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: ['D', '5207', 'E', '119', 'g', '2991', 'G', 'g', 'u']

A: 8317
****
Q: ['89', '5965', '9463', 'k']

A: 15517
****
Q: ['1189', '9841', 'H', 'K', '9801', '879', 'O', 'D', 'd', 'z', '7923', 'U', 'e', '6761', '339', '4185', '2877', 'j', '9345', 'q']

A:
53140
****