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.

['D', '9679', 'e', '5537', 'G', 'l', '2653', 'a', 'Y', '8467', 'q', 'L', '7239', 'O']
33575

['1203', '6179', '9835']
17217

['3787', '371', 'w']

4158