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: ['D', 'G', '9895', '143', '37', 'S', '1539', 'x', 'a', 'x', 'B', 'i', '9719', '839']

Output: 22172


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

Output: 24569


Input: Consider Input: ['407', '6173', 'T', '8257', 'M', '339', 'T', '2845', 'R', 'S', 'j', '2737', 'C', '627', '3889']


Output: 25274