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', 'u', '9595', 'M', 'o', 'K', '5073', 'x']
[EX A]: 14668

[EX Q]: ['t', 'x', '5629', 'k', '2003', 'v', '541', 'l', 'v', '7983', '677', '6173', 'z', 'J', 's', 'u', '2187', 'Y']
[EX A]: 25193

[EX Q]: ['1507', 'b', '9843', '4953', '3003', '1575', 'm', 'j', 'p', '8187', '639', '8965', 'w', 't', '7977']
[EX A]:
46649