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', '8841', 'H', 'v', '2435', '8221', '807', 'P', '2247', 'M', '4609', '5657', 'k', '2807', 'j', '8451']

Output: 44075


Input: Consider Input: ['4145', 't']

Output: 4145


Input: Consider Input: ['4303', 'E', 'U', 'Y', '2841', 'z']


Output: 7144