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: ['u', 'W', '1561', '9243', '4923', '9385']

A: 25112
****
Q: ['R', 'J', 'z', 'o', '1121', '7247', '8987', 'u']

A: 17355
****
Q: ['8109', '5635', 'u', 'M', '1009']

A:
14753
****