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]: ['9905', 'm', 'Q', 'S', 'T', '7821', '1773', '9515', '3963', '2931', '7023', '8677', '1739', 'O', '909', '9153', '8319', 'k', '2851']
[EX A]: 74579

[EX Q]: ['h', '1157', 'm', '8975', '6165', '7491', '1855', '3489', '9629', '631', '9641']
[EX A]: 49033

[EX Q]: ['2247', 'e', '293', 'S', 'E', 's', '6465', 'S', 't', 'g', '9303', '497', '8235', '8015', 'b', 'i', 'Y', 'C', 'M']
[EX A]:
35055