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]: ['2923', '3573', '6179', '7673', '6551', 'B', '315', '5169', 'm', '9405', 'm', 'Z']
[EX A]: 41788

[EX Q]: ['2469', 'c', '6931', 'a', '2167', '9493', '9403', '4123', '4949', 'R', 'V', 'h', '315', 'T', '9411', 'M', '1329', '8217', '6105', 'Y']
[EX A]: 64912

[EX Q]: ['e', 'q', '6837', 'N', '7807', 'b', 'w', '9223', '1197', 'a']
[EX A]:
25064