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.

Input: Consider Input: ['q', 't', '4837', 'F', '2367', '1867', '8361', 'm']

Output: 17432

Input: Consider Input: ['9403', 'u', '4159', 'w', '3467']

Output: 17029

Input: Consider Input: ['1775', '4219', '4531', 't', 'J', 'u', 'J', 'X', '5085', 'v', 'z', '3357', '117', 'Z', '787', '2067']
Output: 21938