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]: ['2325', '3259', '1947', '8065', 'H', '2329', 'h', 'l', 'k', 'R']
[A]: 17925


[Q]: ['E', 'v', 'l', 'c', 'g', '3929', 'q', 'j']
[A]: 3929


[Q]: ['3343', 'y', '5693', '3851']
[A]:
12887