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.
--------
Question: ['5899', '229', 'm', '3347', 'k', 'q', 'g', '2755', '8727', '2035', '823', '6835', '9271', 'Q']

Answer: 39921


Question: ['q', 't', '4837', 'F', '2367', '1867', '8361', 'm']

Answer: 17432


Question: ['7585', 'S', 'E', 'z', '8739', '6435', '1969', 'l', 'n', 'd', '7513', '1071']

Answer:
33312