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]: ['4177', 'd', 'b', 'm', 'f', 'R', '797', '7905', '4355', '7515', '9801', 'F', 'R', '9125', '8445', 'k', 'K', 'K']
[EX A]: 52120

[EX Q]: ['R', '3361', 'c', 'S', 'g', '3829', '7347', '6633', 'e', '9227']
[EX A]: 30397

[EX Q]: ['9303', 'G', '2615', 'M', '8081', 'z', '8377', '1311', '4553', 'X', '8895', 'Y', 'J']
[EX A]:
43135