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.

Example Input: ['a', 'q', '4085', '6327', '6869', 'Z', 't', '7057', '1965', 'p', 'o']
Example Output: 26303

Example Input: ['2683', '4431']
Example Output: 7114

Example Input: ['g', '5301']
Example Output:
5301