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]: ['V', '8137', 'b', 'k', '2081', 'L', '9733', '7525', 'D', '2381', 'O']
[EX A]: 29857

[EX Q]: ['8809', '4559', '2715', 'w', '9903', 'h', 'u', 'F', '9369', '6149']
[EX A]: 41504

[EX Q]: ['1635', 'J', '3477', '8407', 'O', '1177', '1597', '1537', 'o', 'j', 'O', 'T', 'Q', '421', '8841', 'R', '6707', '6237']
[EX A]:
40036