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: ['3319', '575', '7497', '2679', 'h', 'p', 'N', 'y', '9291', 'Z', 'w', '7381', 'x']
A:
30742