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: ['3873', 'D', 'J', '2799', 'k', 'F', 'I', '3457', '5647', '4815', '7509', 'Y', '1251', '2211']

A: 31562
****
Q: ['c', 'E', 'M', '1303', 'y', 'H']

A: 1303
****
Q: ['1581', '4617', 'x', '4987', '8597']

A:
19782
****