a long distance provider charges the following rates for phone calls
create an app that allows the user to select a rate category (from a set of radio buttons) and enter the number of minutes of the call, then displays the charges. include a clear button that clears the input and calculated vales, and an exit button that closes the window. error checking: the minutes input by the user must be numeric, and it must be greater than zero.
can anyone help me with this? i made the program a few times but it wouldnt work so i deleted it all..