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]: ['i', 'w', '8117', '2823', 'C', 'x', 'w', '5959', 'g', 'e', 'L', 'V', 'i', 'w', 'n']
[A]: 16899


[Q]: ['1693', '9237', '7591', '1593', 'R', '6295', '9379']
[A]: 35788


[Q]: ['4397', 'U', '2911', 'Y', 'r', '5953', 'p', '4283', 'T', '9241', '3311', '6515', 'e', '6659']
[A]:
43270