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: 3, 6, ['l', 'C', '6183', 'd', '6519', 'm']

SOLUTION: 12702

PROBLEM: 6, 6, ['V', '8015', 'N', 'O', 'Z', 'V', 'v']

SOLUTION: 0

PROBLEM: 11, 13, ['O', '4429', 'F', '2013', 'v', 'p', 'y', '507', 'g', '935', '1827', 'Q', '4267', 'A', 'm', 'g', 'k', 'S', 'a', 'C', 'q', 'W', 'M']

SOLUTION:
6094