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]: ['7231', '2813', '51', '1745', 'c', 'a', '4929', '3185', '5707', '2095', 'f', 'S']
[EX A]: 27756

[EX Q]: ['b', 'O', '7023', 'q', '2667', '681', 'C', '5707', '7125', 'q', 'Q', '1375', '8869', '6709']
[EX A]: 40156

[EX Q]: ['5293', '5303', 'm', 'I', 'B', 'S', '1795', '9523', '5805', '4155', '1879', '9777', 'D', 'o', 'B', '2921', '663', 'k']
[EX A]:
47114