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: ['g', 'h', '9141', '7825', 'a', 'u', '2389', 'r', '9739', '8337', 'Z', 'Z', '6717']

A: 44148
****
Q: ['5289', '1701', '5925', '7973', 'F', 'V', 'y', '5903', 'i']

A: 26791
****
Q: ['H', 'a']

A:
0
****