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.

['4201', '6445', '4009', 'q']
14655

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

['l', 'j', 'I', '5603', '2415', 'P', '1469', '3147', 'M', 'n', 'O', 'q', '3975', '9467', '4669', '735', 'Q', 'V']

31480