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]: ['6585', '5263', '9497', '1117', 'a', 'F', 'w', '6595', '547']
[A]: 29604


[Q]: ['4241', 'E', '1807', '2877', '5125', '7625', 'S', '401', '5081', 'u', 'R', 'F']
[A]: 27157


[Q]: ['s', '4219', 'x']
[A]:
4219