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]: ['2225', '1925']
[EX A]: 4150

[EX Q]: ['j', 'R', '2435']
[EX A]: 2435

[EX Q]: ['6359', '9585', '1503', '4103', '7145', '7231', 'I', 'q', 'z', '597']
[EX A]:
36523