This program is designed to be a replacement for the legacy Prorating tool from _WLR Automotive_, with the added memory-saftey that **Rust** provides while keeping it all within a simple application.
When using this tool, simply click on the **Current Membership** that your customer has, then select the **New Membership** that your customer wants, then select the **Last Time they were Billed**, and finally click _Submit_ and it'll automatically run through the Math and tell you how long to _Extend/Cut_ their membership by!
