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: 5, 8, ['3017', '2471', 'r', 'M', '8213', '4259', '8397', 'A', '9809', '5827', '4079', 'v', '6735', 'T', 'n', '3877', '9777', '1395', '9631']

SOLUTION: 20869

PROBLEM: 2, 10, ['9653', '3845', 'm', 'K', 'j', '5041', 'W', 's', 'j', 'A', 'G']

SOLUTION: 8886

PROBLEM: 2, 7, ['4417', 'U', 'q', 'T', '887', 'J', '391', 'z', '6873', 'P', 'g', 'L', 'S', 's', '4143', 'X', 'W', 'Y', '2213', 't']

SOLUTION:
1278