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]: ['o', '8089', '2159', '943', '1255', 'w', 'Y', '3723', 'n', '7767', '2209', 'F', 'c', 'J', '5259', '4427', 'n', 'U']
[A]: 35831


[Q]: ['3705', '9217', 'C', '4609']
[A]: 17531


[Q]: ['9079', 'i', '3713', 'C', '1699', 'm', 't', '8909', '8279', 'r', 'D', '389', '5895', 'F', '3613']
[A]:
41576