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.

['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']
30361

['8361', '6757', '5341', '2597', '9803', 'a', 'd', '5889', '9823', 'd', '7947', 'y', 'p']
56518

['J', '2907', 'w', '3371', '4893', 'l', '2691']

13862