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.

['M', 'H', 'l', 'Y', '3811', '1953', '5869', 'U']
11633

['V', 'O', '1309', 'm', '9333', '8283', 'Z', 'K', 'X', 'w', '9855', '9075', '2013', '8485', '9973', '8779']
67105

['5951', 'O', '8571', 'V', 'l', '1097', 'v', 'F', 'g', '4863', 'g', 'T', '2101']

22583