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.

['6941', 'I', 'j', '6135', '6525', '7853', '5607']
33061

['1693', '9237', '7591', '1593', 'R', '6295', '9379']
35788

['5401', 'k', 'h', '3451', 't', '4303', 'f', 'V', 'Y', 'o', '5889']

19044