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.
--------
Question: ['k', 'a']

Answer: 0


Question: ['6867', 'x', '8481', '5091', '979', 'a', 'S', 'i', 'd', '1591']

Answer: 23009


Question: ['j', '1191', 'b', 'u', 'm', 'Z', '9627', 'j', 'p', '6585', '167', 'A', '895', 'z', '5031', '1285']

Answer:
24781