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]: ['187', 'J', 'l', 'p', '1009', 'g', '5817', 'V', 'B', 'Z', '3329', '9253']
[EX A]: 19595

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

[EX Q]: ['x', '4257', 'a', 'u', 't', 'h']
[EX A]:
4257