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.

Example input: ['238', 'h', '92', 'U', '2799']
Example output: 3129
Example explanation: Here, the numbers in the input list are '238', '92' and '2799', hence their sum (238+92+2799) is 3129.
Q: ['3155', '8457', '7413', 'Y', '4385', '5037', 'p', 't', 'r', 'N', 'l', '5685', '6889', 'B']
A:
41021