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.

[EX Q]: ['h', 'a', '1645', '2391', '759', '519', '3331', '2831', '3427', '9893', 'u', 'J', '7391', '8379', 'V']
[EX A]: 40566

[EX Q]: ['u', 'W', '1561', '9243', '4923', '9385']
[EX A]: 25112

[EX Q]: ['n', '1577', '6251', 'l', '5705', 'h', '3769', 'f', '411', '3911', '8007', 'H', 'c', '8531', 'T', '9271']
[EX A]:
47433