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: ['4515', '3911', 'M', 'T', 'w', 'F']

Output: 8426


Input: Consider Input: ['4159', 'H', 'h', 'W', 'w', 'i', 'G', 'l', 'j', '5467', '9219', 'j', 'q', 'n', '5465', '6197', 'J', 'y']

Output: 30507


Input: Consider Input: ['5735', 't', 'U', 'v', 'u']


Output: 5735