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.

['t', 'x', '5629', 'k', '2003', 'v', '541', 'l', 'v', '7983', '677', '6173', 'z', 'J', 's', 'u', '2187', 'Y']
25193

['4089', '2385', 'E', 'K', '259', '295', '6649', '8645', 'n', '2577', '2683', '9041', 'Q', 'm', '4237']
40860

['X', '4075', 'h', '7625']

11700