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]: ['E', 'X', 'C', 'v', '2803', 'g', 'b', '763']
[A]: 3566


[Q]: ['m', '3481']
[A]: 3481


[Q]: ['C', 'l', '8633', 'b', 'A', '9357', '9221', 'K', '5799', '1507', '3277', 'G', '4359', '4021', 'f']
[A]:
46174