I think Craig missed out the negative error for the bill amount

import math

def split_bill(total, number_of_people):
    if number_of_people <= 1:
        raise ValueError("More than 1 person is required to split the bill")
    return math.ceil(total / number_of_people)
try:
    total_due = float(input("What is the total bill? "))
    if total_due <= 0:
        raise ValueError("The bill should more than $0")
    number_of_people = int(input("How many customers are paying this bill? "))
    amount_due = split_bill(total_due, number_of_people)
except ValueError as err:
    print("Oh no! That's not a valid value, please input a number")
    print("({})".format(err))
else:  
    amount_due = split_bill(total_due, number_of_people)
    print("Each person owes ${}".format(amount_due))