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]: ['9989', 'B', 'E', '5181']
[A]: 15170


[Q]: ['u', 'W', '1561', '9243', '4923', '9385']
[A]: 25112


[Q]: ['t', '7447', 'F', '507', '4431', 'L', '1629', '973', 'B', 'h', 'I', '9183', '9535', 'e', 'I', '3147', '6191', 'l', 'W']
[A]:
43043