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]: ['6367', '9923', '9141']
[A]: 25431


[Q]: ['2013', 'S', 's', '9353', 'b', 'u', '6687', '5429', '3545', '7269']
[A]: 34296


[Q]: ['K', '1837', '5501', 'X', '7835', 'f', 'w', 'J', 'V', '4619', '667', '9409', '1301']
[A]:
31169