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]: ['n', 'G', '5059', '8343', '8673', 'P', 'N', '5485', '2279', '6121', 'i', 'U', '7277', '8701', 'A', 'b', 'Z', 'R', '6371', 'G']
[EX A]: 58309

[EX Q]: ['Q', '8841', 'H', 'v', '2435', '8221', '807', 'P', '2247', 'M', '4609', '5657', 'k', '2807', 'j', '8451']
[EX A]: 44075

[EX Q]: ['n', '2427', '6259', 'f', '4797', '8657', 'M', 's', '3229', '8201', 'p', 'g', 'C', 'g', '5435', 'x', '1061', '8419', '4107', 'k']
[EX A]:
52592