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]: ['2485', 'Q', 'G', '5533', 'Y', '21', 'D', 'S']
[A]: 8039


[Q]: ['u', 'W', '1561', '9243', '4923', '9385']
[A]: 25112


[Q]: ['V', '5193', '3543', '2411', '1753', 'a', 'Z', '3445', '9645', 'm', '1825', 'y']
[A]:
27815