Enhance Calculator

[codisher-live-learning]

Feature Request: Enhance Aggregate Calculator

We want to improve the aggregate calculator to support calculating aggregates for more courses and allow users to customize formulas.

Tasks:

• Expand the calculator to handle multiple course inputs.
• Implement options for users to define and save custom formulas.

Feedback and suggestions are encouraged!

[BarryByte]

@codisher-live-learning Please assign me this issue, I can work on this.

[codisher-live-learning]

@BarryByte , Fork this repo and start working on it .

[BarryByte]

@codisher-live-learning Please review this PR.