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]: ['n', 'u', '9595', 'M', 'o', 'K', '5073', 'x']
[EX A]: 14668

[EX Q]: ['1493', 'x', 'h', '31', '3327', '1621', '4529', 'd', '377', 'R', 'X', 'Z', 'G']
[EX A]: 11378

[EX Q]: ['E', 'A', 'K', 'F', '1569', 'I', 'K', 'B', '849', 'P', '9049', 'e', '9961']
[EX A]:
21428