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', '5689', '119', 'p', 'P', 'J', 'w', 'm', '7397', 'Y', '447', 'O', 'p', '319', 'H', 'U']
[EX A]: 13971

[EX Q]: ['v', '3135', 'J', 'm', 'a']
[EX A]: 3135

[EX Q]: ['E', '9765', 'Z']
[EX A]:
9765