Detailed Instructions: 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: ['i', 'b', '9441', 'M', 'z', '1545', '2011', '2413', '6537', '2371', 'F', '7827', '7043', 'o', '381', '6099']
A:
45668