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]: ['U', '9593', '2079', '5959', 'T', '5849', 'w', 'b', '9743', '6689', 'k', 'J']
[A]: 39912


[Q]: ['8529', '2657', '1599', 'b', '8187', '7005', '7481']
[A]: 35458


[Q]: ['4227', '6039', 'p', 'G', 'k', '8811', 'l', 'r', '9169', '6263', '9663']
[A]:
44172