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]: ['29', 'N', '5061', '7191', 'z', '8367']
[A]: 20648


[Q]: ['6255', '8457', 'V', 'z', '4405', 'X', '9267', '5329', 'I']
[A]: 33713


[Q]: ['2025', '5097', 'M', 'R', 'd', '9861', 'j', '3881', '5175', 'j', 'k', 'S', '6841', 'f']
[A]:
32880