Detailed Instructions: 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.
See one example below:
Problem: ['238', 'h', '92', 'U', '2799']
Solution: 3129
Explanation: Here, the numbers in the input list are '238', '92' and '2799', hence their sum (238+92+2799) is 3129.

Problem: ['6591', '9665', 'J', '8073', '437', 'l', '8527', 'f', 'S']
Solution:
33293