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', '1669']

Output: 1669


Input: Consider Input: ['N', 'e', '4283', '3243', '5581', '1407', 'q', 'y', '6685', 'v', 'c', '5995']

Output: 27194


Input: Consider Input: ['i', 'P', 'h', '849', 'e']


Output: 849