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.

['P', '6161', 'k', '5925', 'h', 'G', 'n']
12086

['2765', '6767', '7645']
17177

['f', 'U', 'n', 'w', '3643', '7831', '2747', '739', '4843', '367', 'P', 'V', '6059', 'q', 'G', 'P', 'A']

26229