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.

['6055', 'v', '9455', 'A', '6817', 'D', '9339', 't', 'K', '1993']
33659

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

['3737', 'a', 'V', '6089', '7171', '541', '223', 'o']

17761