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: ['o', '7099', 'G', 'v', 'H', 'J', 'k', '1607', 'i', '9765', '2489', '8031']

Output: 28991

Input: Consider Input: ['2787', 'z', '9351', '3339']

Output: 15477

Input: Consider Input: ['w', '2209', 'd', 'h', '3055', 'f', 'r', '103', '5209', 't', '9311', 'U', '8067', '3319', '285', 'B', '3055', 'H', '2183']
Output: 36796