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]: ['8361', '6757', '5341', '2597', '9803', 'a', 'd', '5889', '9823', 'd', '7947', 'y', 'p']
[EX A]: 56518

[EX Q]: ['Y', '9053', 'N', '6921']
[EX A]: 15974

[EX Q]: ['N', 'J', '6507', 'E', '1889', 'S']
[EX A]:
8396