added total shopping cost & quantity functionality

[juliamuiruri4]

Use this template to add a workshop to this repo. Add the following items:

• Your workshop design document, filled in with some details about your proposed workshop including its title and the three stages in the designer delineated, using the workshop-designer.md file in the template.

• A README.md file that describes the steps of the workshop.

• Powerpoint Slides for the workshop.

• The workshop's solution in the /solution folder.

• An embedded Train the Trainer video.

• A Call to Action to enhance the workshop with a direct line to Microsoft Learn by linking to an appropriate Learn module.

• Code quality check: no authentication keys should be included in solution or sample code

A reviewer will be assigned to the workshop and will work with you to shape it for production. Thank you for your contribution!

[leestott]

Fix in dependencies