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: ['3351', '6445', 'Y', '8455', 'V', 'z', 'a', 'V', 'S', '8551', '4101', 'q', '8743', '5999', '7155', '3825', '2241', '9957']

A: 68823
****
Q: ['e', '6633', '131', '7459', '3733']

A: 17956
****
Q: ['A', 'S', 'p', 'f', '4117', '567', 'd', '9217', 'U', 'V', 'o', 'e', '3001', 'O', '8247', 'g']

A:
25149
****