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]: ['1319', '6105', '1119', 'c', 'p', '7617', '5113', 'a', '5115', '6731', '6693']
[EX A]: 39812

[EX Q]: ['433', 'y', '2015', '5997', 'X', 'u', '9321', '8037', 'N', 'Z', 'E', '4645', '627', '6595', '7679']
[EX A]: 45349

[EX Q]: ['3713', '8155', '3809', '9063', 'S', '2513', 'A']
[EX A]:
27253