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]: ['x', 'd', '5121', 'I', '6737', '3789', '6167', 'C', '8947', 'k', '4715', '1885', 'H', 'B', '5685', 'S', '4615', 's', '7709']
[EX A]: 55370

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

[EX Q]: ['i', 'J', 'O', 'B', '2931', '5983', '7789', '5145', 'L', '6707', 'm', 'V', 'B', 'U', '1305']
[EX A]:
29860