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]: ['U', '5885', 'u', 'Y', 's', 'w', 'j', '9629', '9505', 'U']
[EX A]: 25019

[EX Q]: ['I', '1941', '2423', '3381', 'J', '6589', 'h', 'D']
[EX A]: 14334

[EX Q]: ['b', '321', 'l']
[EX A]:
321