Time Calculation Rules and Requirements for Web Clock

Summary

Client has asked for web clock to have specific time calculation functionalities

Content

I need to include certain rules and requirements in a web clock configuration. Our client has asked that the web clock record time in quarter increments (rounding up and down to 0.25 hours, with a 7 minute grace period) as well as calculate overtime after eight hours worked per day and lunch penalty when employees work for more than five hours in a row, along with a few other requests. I was wondering how I configure these rules to apply to the web clock layout. Do I need to create a fast formula with all these requirements or use already existing calculation