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: ['95', '279', 'y', 'p', '5083', 'X', 'E', '3817']
Example Output: 9274

Example Input: ['61', '5695', 'u', '253', 'n', '1035', 'd', '3017']
Example Output: 10061

Example Input: ['O', 'L', 'p', '6995', '4551', 'm', 'g', '8601', 'z', '1759', '9867', '2847', '4185', 'g', 'e', 'R', 'Z', '1273', 'J', 'L']
Example Output:
40078