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: ['5289', '1701', '5925', '7973', 'F', 'V', 'y', '5903', 'i']

A: 26791
****
Q: ['S', '1249', '6233', 'I', '6733', 'r', 'A', 'E', 'h', 'x', 'p', 'c', '515', '1029', '1593', '1035']

A: 18387
****
Q: ['8609', '8045', '2517', '3821', 'x', '3895', 't']

A:
26887
****