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.

['h', 'a', '1645', '2391', '759', '519', '3331', '2831', '3427', '9893', 'u', 'J', '7391', '8379', 'V']
40566

['q', '6631', 'b', '4207', '7523', '9853', '9203', 'P', '5029', 'b', '2319', '4717', '2485']
51967

['Y', '5279', 'E']
5279