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: ['s', '3881', 'l', '5271', '9227', 'Z', '5429', '7691', '6127', '6301', '8533', 'T', '233', 'j', '1685', 'F', 'b', '3797', '6633', '7917']

A: 72725
****
Q: ['c', '4501', 'O']

A: 4501
****
Q: ['7989', '2335', '1737', 'O', '5353', 'K', '3885', '3755', 'n', 'I']

A:
25054
****