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.

['5829', '9755', '67', 'F', '6347', 'p', 'i', 'X', 'z', 'o', '2321', 'F', '6145', 'B', '3903']
34367

['4271', 'N', 'M', '5239', '7037', 'x', 'U', 's', '7107', '4163', 'f', '3607', '6155']
37579

['7021', '991', 'V', 'n', 'i', '1925', 't', 'I', 'S', 't', 'V', 'L', 'I', 'S']

9937