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]: ['9509', 'o', 'l', '9873', 'h', 'N', '2059', '8595', 'D', 'L', '5913', 'o', '1443', 'C', 'y', 'K', 'J', 'a', 'X', 'E']
[A]: 37392


[Q]: ['3145', 'C', '7725', 'k', 'z']
[A]: 10870


[Q]: ['q', 'S', 'X', '6897', '1755', '8967', 'O', 'X', 'w', '4919', 'b', 'C', 'B', 'Q', '1377', 'K', 't', '4253', 'x', '1845']
[A]:
30013