You should have your own icon for the GUI. You can choose whatever electronics (minimum 5 items). When user make selection on radio button, the selection is appear on edit text that beside "Your selection is:" static text. In addition, the edit text below of that text also change as illustrates below. Then, user need to enter by himself "How many units do you want?" in the beside edit text. In the below example, I put 5 for number of units. After that, user need to select the money note using combo box. When user press "Calculate Change" button, the system calculate the balance according to the selected item and unit. For this example, let's say the user give RM100, the balance is RM100 - (5*2.00) = RM 90.00. The system also able to count how many money notes (including coins 50 cent and 10 cent) will be received by user. For this example, user will received note RM50 1 and RM20 2. In Menu (e.g. System), it will has two sub- menu which is instruction and information of author. Write your own dialog on instruction and information about author. At status bar (e.g. Ready) below, please change the status bar to "Completed" when the system is finished it calculation. Change back to "Ready" after delaying for several seconds. Inventory Components System Menu System Static Please select your drink: text RM21.20 RM31.80 RM14.30 RM31.80 RM12.80 Radio button RM4.20 RMO.80 RM17.80 RM1.80 RM17.80 Edit text Your selection is: stepper Motor Price: RM31.80 Combo How many units do you want? Box 'Your given money? RM100 Calculate Change Static Button AM100 RM50 RM20 RM10 text Your balance is (RM): 90.00 Your received money notes: Edit text RMS0 1 RM10 RM1 RM5 RMO.10 0