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]: ['9903', 'H', '757', 'J', '6481', '9789', 'H', '3285', 'V', 'X', '5229', '7197']
[A]: 42641


[Q]: ['4161', 'E']
[A]: 4161


[Q]: ['9509', '3539', '5473', '3489', 'O']
[A]:
22010