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]: ['a', 'f', '2185', 'N', '6381', '6429', '7499', 'd', '757', 'k', 'k', 'b', 'N', '2697', 'A', '8037']
[A]: 33985


[Q]: ['o', 'a', 'K', '6031']
[A]: 6031


[Q]: ['V', 'm', '77', '3687', '149', '2379', '6729']
[A]:
13021