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: ['9989', 'B', 'E', '5181']

A: 15170
****
Q: ['3883', 'T', '6175', 'B', '4365', '3719', 'V', 'B', '3173', 'K', 'Z']

A: 21315
****
Q: ['8365', '8137', 'm', 'K', '4995']

A:
21497
****