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.

['2485', 'Q', 'G', '5533', 'Y', '21', 'D', 'S']
8039

['f', 'N', '8597', 't', 'K', '9755', 'j', '9747', '7259', '5493', 'n', '7269', '8493', '2279', '5369', 'f']
64261

['1193', '6251', '4793', 'V', '7621', 'i', '8065']

27923