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.

Q: ['457', '173', '6807', 'o', '555', 'l', 's', 'Z', 'm', '3035', '1283', '5645', 'S', '8641', 'J', 'Z', 'z', 'K']

A: 26596
****
Q: ['x', '1887', 'E', '3995', '5677', '2749', '9951']

A: 24259
****
Q: ['y', 'G', '3283', 'e', 'h', 'U', '5337', '6073', '9191', '2607', '2869', 'V', 'I', '1729']

A:
31089
****