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.
['6011', 'G', '9043', '8009', 'e', '9493', 'G', '7969', 'M', 'n', 'p', 'g', '7925', 'H', '3213', '8095', '97', 'F']