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]: ['q', 'U', 'I', '5245', 'g', 'Y', 's', 'V', 'b', 'V', 'D', '1193', 'p']
[A]: 6438


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


[Q]: ['y', '8895', 'O', '1053', '6735', 'T', 'f', '3797', 'S', 'z', '9295', '1603']
[A]:
31378