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.

['6849', 'I', 'p', 's', 'L', '4757', 'j', 'x', 'm', 'P', '5237', '1105', '9015', '9279', 'Q']
36242

['G', 'e', 'R', '4427', '3401', '3065', 'I', '2781', '6829', '5261']
25764

['s', '4623', '1915', 'X', 'Q', 'N', 'p', 'D', 'I', '7797', 'D', '3389', 'Q', '2717']

20441