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.
['2169', 'Q', 'd', '2437', '7867', '571', '39', '1019', 'H', 'z', 'I', '8565', 'q', 'D', '7733', '6267', 'M', 'T', 'S', '293']