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.

['2775', '7405', 'F', 'D', '9025', '827', 'e', 'j', 's', 'e', 'Q', '1137', 'G']
21169

['7361', '6913', '3605', '2081', '7619']
27579

['a', '8395', '6979', '7115', '5925', 'N', 'i', 'J', 'U']

28414