The two programs we made in the National Skills and Leadership Conference computer programming competition 2016. I ended up taking first place! Although the two programs are fairly simplistic (due to our competition's time restraints), they were subject to rigorous evaluation by professionals from the industry.
This program allows you to choose the number of each item you'd like, and calculates the total price. It will also display the cumulative total of sales for that session.
You can input any amount of grades for each class, and then calculate the high, low, and average for each class. This is all presented with an intuitive GUI.