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: ['z', 'E', 'u', '4437', '7767']

Output: 12204


Input: Consider Input: ['G', 'Z', '4819', '9763', '9987']

Output: 24569


Input: Consider Input: ['v', 'Q', '1923', 't', 'r', '2867', '5923', 'w']


Output: 10713