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.

['6551', 'm', '3941', 'F', 'K', 'u', '7981', '9581', 'X', 'M', 'N', 'e', 'G', 'i']
28054

['901', 'X', 'W', 'D', 'm', 'M', '59', '4855', '6523', 'R', '9781', '8271', '4449', '2221', '8391']
45451

['6129', '1811', 'A', '2745', 'O', '4057', 'b', '1237', 'm', 'H', 'M', '3867', 'x']

19846