Custom tip amount

Change the tip program, so that the user can enter a custom tip amount. Instead of 0.15, the user can enter whatever s/he wants.

The worksheet could start like this:

The user clicks the button and sees:

If the user changes 0.15 to 0.2 and clicks the button:

Hints:

• Start by adding a row for tip rate on the worksheet.
• Add a new variable to the code.

Upload your worksheet.