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: 14, 15, ['N', 'u', '4633', '5481', '2469', 'y', '2253', '4629', '8399', 'q', 'H', '8507', '1789', 'A', '5085', 'G', '9679', 'G', 'u', '9381']

SOLUTION: 5085

PROBLEM: 4, 6, ['v', 'f', '5021', 'v', 'M', '6345', '1159', 'C', '8173', '6299', 'r', '8877', 'a', 'm', 'k', '2935']

SOLUTION: 6345

PROBLEM: 26, 29, ['I', '203', 'f', 'K', 't', '9581', 'V', '9265', '7683', '5351', 'r', '4487', 'c', '699', '7649', '6341', 'm', 'g', '285', '3255', 'd', '8165', 'e', 'W', 'Z', 'Y', 'z', 'q', '8133', '6973']

SOLUTION:
8133