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: ['6217', 'A', '1925', 'o', '1433']

A: 9575
****
Q: ['2013', 'S', 's', '9353', 'b', 'u', '6687', '5429', '3545', '7269']

A: 34296
****
Q: ['L', '179', '2873', 'c', 'q', 'V']

A:
3052
****