15. Open the VB2015\Chap05\Jetters Solution\Jetters Solution (Jetters Solution.sln) file.

The txtPrice control should accept only numbers, the period, and the Backspace key;

code the appropriate procedure. The txtQuantity control should accept only numbers and the Backspace key; code the appropriate procedure. Jetters now uses the discount rates shown below. Make the appropriate modifications to the btnCalc_Click procedure.

Test the application appropriately.

Quantity purchased Discount rate 0–10 0 11–15 2%

16–20 2.5%

Over 20 3%