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: ['v', 't', 'a', 'r', 'O', 'I']

Output: 0

Input: Consider Input: ['3565', 'z', '8811', 'z', 'U', '113', 'I', '1307', '135', 'V', 'P', '5183', '2505', '4863', '1113', 'A', '7575', '827', 'B']

Output: 35997

Input: Consider Input: ['z', 'O', 'J', '523', '3971', '2741', '4483', '239', 'j', 'F', 'u', 'E', 'z', '9739']
Output: 21696