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]: ['3107', 'D', '9595', '8807', 'Q', 'o', 'T', 'N', 'A']
[EX A]: 21509

[EX Q]: ['7187', '5651', 'd', '4869', 'q', '2375', '3547']
[EX A]: 23629

[EX Q]: ['c', '5201', 'Z', 'F', '9083', '1869', 'h', '2833', '1441']
[EX A]:
20427