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]: ['4145', 't']
[EX A]: 4145

[EX Q]: ['6815', 'A', '1055', '4687', '8675', '4615', 'a', '2127', 'w', 'l', 'J', '5025', 'c', 't', '9727', 'G', '8431']
[EX A]: 51157

[EX Q]: ['Y', 'U', '6561', 'O', '3307', 'n', 'x', '3817', '5543', 'b', '9205', '2567', 'E', '9975']
[EX A]:
40975