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]: ['G', 'e', 'R', '4427', '3401', '3065', 'I', '2781', '6829', '5261']
[A]: 25764


[Q]: ['Z', 'w', 'M', '2233', '5275', '5277', 's', '971', '7085', '6259', 'V', 'E', '4923', '7365', 'c', 'd', 'c', 'U', 'P']
[A]: 39388


[Q]: ['2827', '7009', 'D', 'x', 'Z', '9131', '6573']
[A]:
25540