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]: ['q', '6631', 'b', '4207', '7523', '9853', '9203', 'P', '5029', 'b', '2319', '4717', '2485']
[A]: 51967


[Q]: ['901', 'X', 'W', 'D', 'm', 'M', '59', '4855', '6523', 'R', '9781', '8271', '4449', '2221', '8391']
[A]: 45451


[Q]: ['q', '2461', '4603', '1147', '1995', 'H', 'H', '821', '2699', 'Q', '7383', '6841', 'x', 'Y', '2797', '531', '9813', '3827']
[A]:
44918