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]: ['901', '1939', '7637', '8863', 'X', '5003', '8791', '4757', 'E', '1525', 'y', '9735']
[EX A]: 49151

[EX Q]: ['4463', '489']
[EX A]: 4952

[EX Q]: ['B', 'e', '1889', 'O', 'v', 'W', 's', '8855', 'x', '7635', 'k', '6133', '769', '9369', '8151', '8081', '1097']
[EX A]:
51979