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', 'd', 't', '8235', '2279', '7477', '3029', '4377', '9153', '4309', '2295', '407']
[A]: 41561


[Q]: ['z', '447', '9781', 'R', '6083', 'u', '9229', 'Z', 'F', '2437', '9677', 'n', 'G', '6763', '5883', 'B', '9563', '4575']
[A]: 64438


[Q]: ['Q', '1853', '6445', 'O', '3865', 'v', '7907', 'O', 'x', '4921', '9455', 'Y', 'c', 'C', '7113', 'o', '4393', '4227']
[A]:
50179