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: ['8755', 'A', '2893', '6703']

A: 18351
****
Q: ['3281', '6977', 'd', '2853']

A:
13111
****