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

['Z', '6245', 'N', '1403', 'b']
7648

['K', 'o', '1119', 'd', 'a', '4519', 'q', 'n', 'k']

5638