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, ['3291', 'e', 'm', 'E', 'e', '3201', 'E', 'c', '2355', '6491']

SOLUTION: 3201

PROBLEM: 2, 3, ['9191', 'D', '1937', 'N', 'g', '3485', '7327']

SOLUTION: 1937

PROBLEM: 3, 3, ['9773', '6427', '2889', '1697']

SOLUTION:
2889