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: ['1057', '3937']

A: 4994
****
Q: ['191', 'R', 'Q', '7809', '4851', 'b', 'e', 'H', 'E', 'I', 'r', 'A', 'g', 'e', 'g', 'I', 'j', 'f', '7287']

A: 20138
****
Q: ['K', 'X', 'S', '5899', '2991', 'w', '9703', '7615', '5145', 'H', '7483', '4935']

A:
43771
****