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.

['g', 'M', 'I', 'V', '3377', '7309', '3617', 'v', '9207', 'k', '387', 'g', 'C', '4785', '1527', 'O', 'A']
30209

['c', 'd']
0

['2285', 'I']

2285