And another set for the cost keeping the item inventory either

Use 2 groups of radio buttons to choose the cost to prepare the order as either 10, 15 or 20 and another set for the cost of keeping the item in inventory as either .05, .25, 1.00. Use the Select Case statement to determine which radio button is selected.

. When the user clicks the Calculate button, the application will use a nested IF with Boolean variables to check to see if the TryParse correctly converted the annual demand and the cost per unit text box. Use a nested IF to display an error message for each text box in a message box with an exclamation icon and highlight the contents of the text box. So the user can easily correct it.

Create a quit button that will stop processing.

Remember to use Option Explicit, correct naming conventions, indentation, name the Form and set the text property of the form..