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]: ['5899', '229', 'm', '3347', 'k', 'q', 'g', '2755', '8727', '2035', '823', '6835', '9271', 'Q']
[A]: 39921


[Q]: ['n', 'W', '565', '6625', '903', 'o', '7995', '8339', '5251', 'e', 'a', '1081', '5813', 'o']
[A]: 36572


[Q]: ['1821', '6647', '2509', 'n', 't', 'X', 'X', 'v', 'y', '6799', '2009', 'I', '2945', '5033', '1259', '227', '5429', 'l']
[A]:
34678