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]: ['6161', 'p', '2839', 'c', '5905', '1729', 'j', '5901', '3013', 'e']
[EX A]: 25548

[EX Q]: ['w', '1335', 'G', 'h', '6729', '1999', 'u', 'I', 'r', 'm', '4757', 'W', '3715', '701', '1999']
[EX A]: 21235

[EX Q]: ['7091', '7821', 'S', 'X', 'K', 'C', 'h', 'D', 'm', '1383', '8197', '5587', '7187', '8255', '5367']
[EX A]:
50888