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: ['6787', 'W', 'I', '4929', 'j', 'I', '3487', 'F', '3927', 'Q', 's', 'X', '9939', 'n']

A: 29069
****
Q: ['p', 'V', '673', '8483', 'S']

A: 9156
****
Q: ['V', 't']

A:
0
****