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.
['b', 's', '1059', 'n', '7287', '327', 'E', 'X', '5039', 'b', '6049', '513', 'F', '2755', 'y', '1543', '9353', '2523']