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.

['3877', '2685', 'f', 'r', 'q', 'o', 'k', 'i', '2299', '9075', 'X', '4303', '7379', '9205', 'V', '9655', 's']
48478

['x', '5259', 'T', 'L', 'C', 'H', '2493', 'u', '3851', '2439', 'U']
14042

['9677', 'o', '9785', 'Y', '6659', '6133', 'G', 'K', '8531']

40785