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: ['3051', '5343', 'k', 'k', '6815', 'E', '4745', 'A', 'A', '1251', '6649', 'f', '4133', 'X']

A: 31987
****
Q: ['2013', 'S', 's', '9353', 'b', 'u', '6687', '5429', '3545', '7269']

A: 34296
****
Q: ['2877', '5291', 'J', 'a', 'Q', '9605', 'x', '5491', '4133', '6575']

A:
33972
****