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', '425', '6135']
[A]: 6560


[Q]: ['3557', '3345', '307', '9791', '1897', 'O']
[A]: 18897


[Q]: ['e', '6083', 'W', '7037', '7989', '9257', 'B']
[A]:
30366