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]: ['3895', 's', 'j', '7755', 'H', '7941', '4903', 's', '3629', '1183', '1001', '5569', 'q', '4735']
[A]: 40611


[Q]: ['q', 'N', 'y', '7859', 'u', '2861', '4151', 'Q', 'x']
[A]: 14871


[Q]: ['7813', 'Z', '2075', '7735', 'b', '9423', '6511', '4801', 'k', 'S', '101']
[A]:
38459