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]: ['3723', 'v', 'j', 'e', '2017', 'd', '4211', '2079']
[EX A]: 12030

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

[EX Q]: ['Q', 'o', 'C', '3083', 'r']
[EX A]:
3083