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: 1, 7, ['173', '5875', 'C', '7417', '3565', '1949', '537', '7707', 'o', 'y']

SOLUTION: 19516

PROBLEM: 1, 2, ['3863', 'u', 'z', '5805', 'm', 'M', 'R', 'T', 'Q']

SOLUTION:
3863