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]: ['I', '7815']
[A]: 7815


[Q]: ['D', '1611', 'w', '8825', '8987', '3021', '9019', 's', '87', '9283', '5717', 'f', '1503', '6593', '8533', '785', 'g']
[A]: 63964


[Q]: ['m', '8823', '2791', '6041', 'w', 'A', 's', 'V', 'W', 'b', '9201', 'x', '5733', 'D', '1539', 'Y']
[A]:
34128