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: ['z', 'T', 'Y', 's', 'j', '585', '7833', '2601', '8057', 'S', '7037', '5799', '4477', '5377', '6301', 'P', 'm', '9431', 'f']

Answer: 57498


Question: ['7067', 'E', 'C', '1879', 'Z', 'u', 't', '2053', '6769', 'r', '5207', '7009', 'H', '5587', 'i', 'M', '1357', 'A']

Answer: 36928


Question: ['r', '2365', '3179', 'x', '1709', '2141', '3545', 'M', 'O', 'c', '7353', 'b', 'j', 'X', 'x', 'i']

Answer:
20292