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.

[Q]: ['887', '8133', 'X', '2253', '8461', 'I', '5425', 'Z', 'z', 'r']
[A]: 25159


[Q]: ['2871', '1337', '3771', '4671', 'l', '3785', 'V', 'z', 'R', 'u', '6097', 'R', '4297', 'd', '6339', 'Y', 'V', '5873', '7399']
[A]: 46440


[Q]: ['M', 'F', '2815', '3231', 'r', 'U', '739', '3423', '6275', 'B', '9207', '9311', '4795', '9415', 'P', 'X']
[A]:
49211