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.

['A', '6323', 'T', 'H', 'M', 'S', 'D', 'r', 'v', '8169', '7649', '5149', 'x', '6275']
33565

['2097', '7815', 'f', '1705', '7553', 'C', 'n', '7091', '1253', 'z', '9229', 'H', 'N', '6481', 'H', 'M', 'G', '4527', '8537']
56288

['3705', '9217', 'C', '4609']

17531