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.

['773', 'e', '4451', 'S', 'I', 'r', 'e', 'V', 'Q', 'g', 'J', 'L', '7655', 'O']
12879

['7763', '6003', 'V']
13766

['d', '9931', '1831', '1185', 'P', '6195', '6667', '2639', 'X']

28448