Bug 601

The problem has been solved by editing the ratio.

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package membership;

public class NonMembership extends Membership {

	public NonMembership() {
		super(1.0, 0, "Non-member");
	}

}

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Please input your Worker ID for logging in the system...
1
Please input your Member ID for logging in the system...
0
---Welcome to Morx Supermarket---
---To continue, please proceed your actions---
Input (1) for accessing Inventory System
Input (2) for accessing Checkout System
Input (3) for accessing Sales System
Input (4) for accessing Membership System
Input (5) for switching member
Input (6) to exit
2
---Welcome to Checkout System, ON9.---
Input commands for further management:
Input (1) for Checkout
Input (2) for refund
Input (3) for exit
1
No                  Description         Quantity            Price($)            
1                   Coke                200                 2000.0              
2                   Salt                50                  1000.0              
Please input (0) for proceed to checkout
Please input (1) for remove products
Please input (2) for modify quantities of products
Please input (3) to cancel the checkout process
0
The total amount is: $3000.00
Please Input the amount of dollars that the customers paid
3000
Total changes is $0.00
Input commands for further management:
Input (1) for Checkout
Input (2) for refund
Input (3) for exit