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]: ['b', 's', 'v', '4757', '9063', 'I', '8397', '7975', 'Q']
[EX A]: 30192

[EX Q]: ['w', '1335', 'G', 'h', '6729', '1999', 'u', 'I', 'r', 'm', '4757', 'W', '3715', '701', '1999']
[EX A]: 21235

[EX Q]: ['B', '7887', 'a', 'S', '1873', 's']
[EX A]:
9760