TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 1, 2, ['X', '6095', '5959', '4481', '5997', '3307', 'B']

SOLUTION: 6095

PROBLEM: 2, 19, ['u', 'x', '1103', 'K', 'N', 'o', '1943', 'Z', 'r', 'B', 'N', 'e', '7289', 'S', '325', 'G', 'x', 'D', '9005', 'y', '1729', '961', '4621', 'D', 'u', '1235']

SOLUTION: 19665

PROBLEM: 1, 2, ['8421', 'R']

SOLUTION:
8421