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]: ['4089', '2385', 'E', 'K', '259', '295', '6649', '8645', 'n', '2577', '2683', '9041', 'Q', 'm', '4237']
[EX A]: 40860

[EX Q]: ['5347', 'E', 'a', '5379', '405', '1171', 'v', 'J']
[EX A]: 12302

[EX Q]: ['8651', '5993', '1491', '5869', 'r', 'M', 'm']
[EX A]:
22004