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.
One example is below.
Q: ['238', 'h', '92', 'U', '2799']
A: 3129
Rationale: Here, the numbers in the input list are '238', '92' and '2799', hence their sum (238+92+2799) is 3129.
Q: ['g', 'k', 'P', 'S', '1299', '6185', 'f', 'k', 's', '4735', 'v']
A:
12219