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]: ['a', 'j', 'v', '619', 't', 'a', '5777', 'x', 'R', 'P', '8897', 'j']
[EX A]: 15293

[EX Q]: ['887', '8133', 'X', '2253', '8461', 'I', '5425', 'Z', 'z', 'r']
[EX A]: 25159

[EX Q]: ['A', '9785', '1739', 'x', '2389', 'O', 'J', '1407', '9067', 'x', '9747', '2485', '4631', '6021', '4077', '2779', 'V', '2449', '7401']
[EX A]:
63977