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', 'd', 't', '8235', '2279', '7477', '3029', '4377', '9153', '4309', '2295', '407']
[A]: 41561


[Q]: ['A', '9775', '5867', 'n', '1329', '5973']
[A]: 22944


[Q]: ['2119', '8891', '6223', 'Y', '1313', '9811', 'c', '4743', '6025', '4949', '5143', 'C', '3859', '1795', 'U']
[A]:
54871