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myButton_btn.addEventListener(MouseEvent.CLICK, FindComission);
// This will set the compiler
// waiting for a mouse click
// on our button

function FindComission (event:MouseEvent):void
{
// Let’s find out what is on our screen!
var myAmount:Number = Number(Amount_txt.text);
// This will find out what is on the Amount Box
// and convert it to a value

var myRate:Number= Number(Rate_txt.text)/100;
// Since we are looking for a percentage
// we are dividing the value by 100

var myComission:Number = myAmount* myRate;

// Now let’s put the result
// in the Dynamic Text Box
// The Value has to become a string

Total_txt.text = String(myComission);

//Thanks for Watching!!