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.
['9025', 'Y', 'I', '5849', 'C', 'h', 'W', 'w', 'I', '9973', '6161', '7373', '2595', 'B', 'T', '1079', 'x', 'N', 'V']