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', 'V', '673', '8483', 'S']
9156

['5715', 'r', 'R']
5715

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

12086