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]: ['6723', '1', '6357', '1497', 'A', 'p', 'N', 'T']
[A]: 14578


[Q]: ['A', 'S', 'c', 'I', 'M', 'P', '8739', '879', '1401', '3941', '4061', 'q', 'P', '2805', '4473']
[A]: 26299


[Q]: ['2097', '7815', 'f', '1705', '7553', 'C', 'n', '7091', '1253', 'z', '9229', 'H', 'N', '6481', 'H', 'M', 'G', '4527', '8537']
[A]:
56288