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]: ['s', '407', '7983', '1523', '8983', '9841', 'p', 'y', 'N', '7633', 'T', '4177', 'Z', 'Y', '3223', '7125', '2601', '7467', '3039']
[A]: 64002


[Q]: ['j', 'f', '3831', 'B', 'D']
[A]: 3831


[Q]: ['D', '7267', '5801', 'w', '8607', 'k', '2807', 'D', 'Y', 'c', '4459', 'g', '1933']
[A]:
30874