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]: ['I', 'J', 'K', 'D', '5961']
[A]: 5961


[Q]: ['i', 'X', '2019', '8501', 'f', '1643', '4285', '665', 'Z', '4995', '4157', 'S', '587', 'c', '7263', '7473']
[A]:
41588