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]: ['E', 'y']
[A]: 0


[Q]: ['Q', '9787', '7533', '9489', 'C', '1753', '5121', '1405', '9267', '4815', 's', '5887']
[A]: 55057


[Q]: ['4235', 'V', 'b', '9131', '9081', '2619', '2331', 'N', 'u', '2543', 'L', 'M', '4827', 'k', '9421', 'a', 'Q', 'j']
[A]:
44188