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.
['h', 'p', 'z', 'M', '6067', 's', 'h', 'c', '2419', 'B', '7227', '8059', 'h', 'K', 'j', '2751', 'J', '4351']