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.

['I', 'n', '3069', '477', 'F', 'k', '847', '6777', 'N', 'X', 'F', '1417', '9445', 'o', 'v', 'd', '2169', 'w']
24201

['u', 'e', 'P', 'D', '255', '2573', 'E', 'P', 's', '3725', '3391', 'I', '5323', '885']
16152

['R', 'D', '703', '5311', 'G', 'D', 'b', '7713', '4813']

18540