PROGRAM OBJECTIVE

Write a program for a checkout system in a store named Shoestring Store that sells shoestrings. The shoestrings are sold in pairs, their color, width, and materials are

standard. The shoestrings are only distinguished by the number of pairs of eyelets that it is designed for, which determines their length. The program should be able to

handle the different types of shoestrings being purchased by customers. The types of shoestrings are distinguished by the number of pairs of eyelets of the shoes that they

are for. The program should calculate the subtotal for the number of each type of shoestring pair being ordered and the total cost of the purchase.

DELIVERABLES

A Python program named program$5\_1.$py that meets the requirements outlined in the instructions.

A separate module file containing the custom function for calculating the subtotal of each type of shoestring pair

This program shall also meet all requirements stated in the assignment requirements section above and the evaluation criteria stated in the section below and

will be scored using the assignment rubric.

INSTRUCTIONS

Start by prompting for the number of different types of shoestrings being purchased. This number should be entered as a whole number and will be used to

control how many times the loop repeats.

Start the loop and within each occurrence of the loop prompt for the type $($the number of eyelets that it is designed for$)$ of the shoelace pair and the quantity of

each type of shoestring pair being purchased. The number of pairs of eyelets can vary from $3$ to $10,$ but you can assume that a valid whole number value

within that range is being provided by the end user. You can also assume that a whole number value is being entered for the quantity.

Pass the values for number of eyelets and quantity as arguments to a custom function that is defined in a separate module file.

The imported function should calculate the subtotal for the item and return it to the main function. Each pair of eyelets should be costed at $50$ cents. The main

function should print the total cost after the loop ends. The total cost should be reported in currency format as described in the requirements above.

ADDITIONAL EVALUATION CRITERIA

In addition to the requirements for this module stated in the section above, your program will also be evaluated on the following criteria:

The program should be able to accurately calculate the subtotal for each type of shoestring pair and the total cost of the purchase.

The program should be well$-$structured, with a main function and a separate module file for the custom function.

The code should be clean, readable, and well$-$commented.

The program should handle input and output correctly, with prompts and output formatted as in the example input$/$output$.$

EXAMPLE INPUT$/$OUTPUT

Enter the number of different types of shoelaces being purchased: $2$

Item $1$:

Enter the number of eyelet pairs: $3$

Enter the quantity: $1$

Subtotal for Item $1$: $$1\mathrm{.}50$

Item $2$:

Enter the number of eyelet pairs: $4$

Enter the quantity: $2$