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: 4, 7, ['6307', 'N', '5209', 'M', 'k', 'd', '6933']

SOLUTION: 6933

PROBLEM: 5, 6, ['x', 't', '9767', '4787', 'T', 'e', 'Y', '8919']

SOLUTION: 0

PROBLEM: 1, 3, ['7761', '8333', 't']

SOLUTION:
16094