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.

['6367', '9923', '9141']
25431

['5331', 'f', '2865', '6019', 'U', 'm', 'g', 'n', 'Y', 'A']
14215

['E', 'R', 'Y', 'E', 'Z', '1841', 'B', '9901', 'g', 'C', '3299']

15041