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.

['K', '9121', 'y', '4233', '1513', 'd', '5609', 'C', 'q', 'p', 'S', '627', 'q', 'I']
21103

['Y', 'X', 'd', 'N', '1877', '2865', 'M', '1249', '9385', 'v', 'o', 'P', 'P', '6029']
21405

['t', 'X', '819', 'n', '8407', 'h', '3655', '4023', '769', '357', '5157', '4205', '3071', '1013', 'Y']

31476