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

[EX Q]: ['C', '3133', '2183', '5793', '9305', 'd', 'g', '6501']
[EX A]: 26915

[EX Q]: ['W', 'W', 'E', '979', '1435']
[EX A]:
2414