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]: ['7465', 'G', '105', 'A', '3987', 'O', '7385', 'C', '8957']
[EX A]: 27899

[EX Q]: ['7067', 'E', 'C', '1879', 'Z', 'u', 't', '2053', '6769', 'r', '5207', '7009', 'H', '5587', 'i', 'M', '1357', 'A']
[EX A]: 36928

[EX Q]: ['L', '4809', 'X', '849']
[EX A]:
5658