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]: ['r', '2251', 'X', 'H', 'a', '5463', 'g', 'M', '9797', '1581', 'o', 'm', 'v', 'E']
[EX A]: 19092

[EX Q]: ['b', 'O', '7023', 'q', '2667', '681', 'C', '5707', '7125', 'q', 'Q', '1375', '8869', '6709']
[EX A]: 40156

[EX Q]: ['635', 'U', 'I', 'p', 'I', '5449', 'b', 'N', '4351', 'U', 'v', '3805']
[EX A]:
14240