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]: ['z', 'U', '6817', 's', '3731', 'M', 'I', '1095', 'l', '5993', '5207', 'e', 'L', '5361', 'v', 'g', '1963', '4829', '9541', '8261']
[A]: 52798


[Q]: ['K', '4403', 'a', '3881', '4139', 'w', '1861', 'G']
[A]: 14284


[Q]: ['1679', '6507', 'k', 'n', 'm', '9495', 'y', 'A', 'W', 'W', 'Q', '4213', '3947', '1971', 'Z', 'S']
[A]:
27812