A small restaurant known as the famous Indonesian Food Restaurant in Surabaya offers several foods for their customers. 
They'd like to create a simple cash program when their customers want to pay the bill. 
The Menu Interface designed as follows:
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       DELICIOUS BLUE RESTAURANT
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1. SPECIAL DELICIOUS SATAY    IDR 30,000
2. FAVORITE GRILLED FISH      IDR 55,000
3. UNFORGETTABLE FRIED PRAWN  IDR 45,000
4. FRESH FRUIT PUNCH          IDR 15,000
5. CASH
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The Flow:
1. Customers will order and staff will input their order
For example: SPECIAL DELICIOUS SATAY (Qty:2) and FRESH FRUIT PUNCH (Qty:2)
2. When finished, customer will get a bill based on their orders
SPECIAL DELICIOUS SATAY  2pcs @ IDR 30,000 = IDR 60,000
FRESH FRUIT PUNCH        2pcs @ IDR 15,000 = IDR 30,000
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TOTAL OUTSTANDING                          = IDR 90,000

Program Criteria
1. Choosing 1-4 will asking input from user for the quantity of each menu
2. There is a check when user has already chosen one menu, he can't choose it again until he choose CASH
3. When user select CASH, the program will calculate all the orders and display it on the screen

Program Assessment
1. ERROR Free (Syntax, Logical and Run Time)
2. Well Designed User Interface
3. Source Code (must be submitted at least one day before)
4. Program Demo, Question and Answer