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: ['e', '6633', '131', '7459', '3733']

A: 17956
****
Q: ['n', '6681', '4069', '5011', '4015', '5783', 'm', 'z', 't', 'W', '7299', 'r', '4561', '1797', 'N', '2025']

A:
41241
****