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.

Let me give you an example: ['238', 'h', '92', 'U', '2799']
The answer to this example can be: 3129
Here is why: Here, the numbers in the input list are '238', '92' and '2799', hence their sum (238+92+2799) is 3129.

OK. solve this:
['M', '2045', '5625', 'f', '5117', '1535', '1335', 't', '985', '5987', 'l', 'Q', '6737', 'Y', '8291', 'D', 'y', '1887', '3315']
Answer:
42859