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: ['4389', '8535', 'D', '6063', 'z', 'r', 'w', '5725', '291', 'a', '9059', '569', '2943', 'W']

A: 37574
****
Q: ['o', 'O', 'H', '7619', '6435', 'X', 'g', '1663']

A: 15717
****
Q: ['s', 'V', '2541', 'Z', '303', 'R', '3633', '3903', 'X', 'M', '5727', '2921', '169', '7463', '8501', 'c', '9951', 'K', 'K', '5109']

A:
50221
****