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]: ['D', '5207', 'E', '119', 'g', '2991', 'G', 'g', 'u']
[EX A]: 8317

[EX Q]: ['9069', '8333', 'H', '2049', '8051', 'L', '2749', '8819', '2883', '9317', 'M', '6515']
[EX A]: 57785

[EX Q]: ['H', 'w', '8921', '1485', '1345', 'z', '8915', '6013', 'O', '403', '9003', '5341']
[EX A]:
41426

