Did you follow a template to create these calculation methods? I started writing a code to calculate the net income of my father's company employees, but I don't know if I used the correct formulas. I found on the internet some blogs that offer tips and tricks about payment systems, including ThePayStubs. But I'm still curious what else other programmers use. By the way, you did a good job! In the future, name the functions more explicitly. It will be easier for you to read the code when you return to it.