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]: ['G', 'Z', '4819', '9763', '9987']
[EX A]: 24569

[EX Q]: ['q', '5151', 'R', '441']
[EX A]: 5592

[EX Q]: ['L', '3443', 'p', '101', '9299', '4441', 'g', 'y', '5095', 'L']
[EX A]:
22379