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.
['4317', '3357', 'n', '197', 'd', '1655', 'I', '7231', '2255', '4683', 'K', '8247', 'E', 'F', 'g', 'y', '9565', '9001']