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: ['3215', 'h', '9133', '2771', 'F', 'x', '9033', '709', 'q']
Example Output: 24861

Example Input: ['4601', '6021', '3005', 'I', 'f', '4631', 'Q', 'd', '8041', 'D', '8067', '7383', '757', 't', 'd', 'n', '2275', 'p', 'm', '6021']
Example Output: 50802

Example Input: ['9487', '427', '3669', 'D', '8761', '2659', '279', '8783', '7981', 'X', '7363', 'I']
Example Output:
49409