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]: ['n', 'u', '9595', 'M', 'o', 'K', '5073', 'x']
[A]: 14668


[Q]: ['Y', '8169', '9067']
[A]: 17236


[Q]: ['9211', '1889', '7371', '9649', 'b', 'y', 'q', 'a', 'i', '1137', '3291', '8625']
[A]:
41173