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', '9377', '3663', '1375', 'j', 'L', '7943', '1711', '7409', '9115', '1227', 'I', 'U']
[A]: 41820


[Q]: ['129', '8667', 'E', '2919', 'e', 'Y', 'h', 'm', '501', '5911', 'q', '4955', 'D', '1369', 'W']
[A]: 24451


[Q]: ['s', 'H', 'Y', '4405', '5539', '1621', 'E', '2657', '9689', 'w', 'P']
[A]:
23911