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]: ['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']
[EX A]: 30361

[EX Q]: ['p', 'V', '673', '8483', 'S']
[EX A]: 9156

[EX Q]: ['l', 'Y', 'G', 'd', 'R']
[EX A]:
0