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

['6941', 'I', 'j', '6135', '6525', '7853', '5607']
33061

['5023', '7017', 'j', '5819', 'k', 'j', '3259', 'K', '6353', 'h', 'o', 'z', 'i', 'k']

27471