Partially fixing ModuleCalculator.java

[chicago4550]

Changelist

• Fixed Small issues with ModuleCalculator.Java and renamed variables to more understandable and relatable names

  Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)

Local configuration:

• OS: (Windows)
• JDK: (JDK 11)

[zzzowoey]

You don't need to open a new PR to include any further commits as long as you push them to the same branch in your fork. I'm closing this, and I'll merge #58 in a bit.