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]: ['6849', 'I', 'p', 's', 'L', '4757', 'j', 'x', 'm', 'P', '5237', '1105', '9015', '9279', 'Q']
[A]: 36242


[Q]: ['4201', '6445', '4009', 'q']
[A]: 14655


[Q]: ['j', 's', '1647', 'r', 'v', '1973', 'p', 'f', '431', '3561', '1121', '6131', '8639', 'b', 'P']
[A]:
23503