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.
['9201', '5685', 'v', 'w', 'v', 'r', 'Y', 'm', 'q', 'e', 'P', '7595', 'c', 'W', 'd', '9985', 'V', '3719']