Question 24d: Dict

Supermarket Billing System

You are building a mini supermarket checkout system where a cashier scans items, updates quantities, applies discounts, and prints a receipt.

🧾 Task Instructions

🔹 Step 1: Create Shopping Cart

1. Ask the cashier:

   Enter number of items customer is buying:
   

2. Use a loop (for with range) to collect items.

For each item:

• Ask for:

  • Item name

  • Quantity

• Store each item in the cart list

• If quantity is more than 5, insert the new item at the beginning of the cart

• Otherwise, append it to the end

🔹 Step 2: Create Price Database (Dictionary)

1. Create an empty dictionary

2. Loop through the cart list:

   • Ask for price of each item

   • Store like:

     {"Rice": 1200}
     

3. If price is divisible by 10 

   • Apply 5% discount on the item price

🔹 Step 3: Update Item name, quantity and Pricebook (Modify Items)

1. Ask:

   Do you want to update any item? (yes/no)
   

2. If yes:

   • Display items

   • Ask for item number

   • Ask for new quantity

   • Update the items

🔹 Step 4: Calculate Total Bill

1. Loop through the cart

2. Multiply:

   quantity × price
   

3. Store totals

🔹 Step 5: Print Receipt

Display:

Item     Qty     Price     Total
--------------------------------
Rice     2       1200      2400
Beans    1       800       800
--------------------------------
Grand Total: ₦3200