I thought the simplest part of an employee cost calculator would be the salary input. In the UI, it looks harmless: Salary: 85000 State: California Then the calculator should explain what that employee roughly costs the employer. The hard part is that the salary is not the model.

Source: [Dev.to](https://dev.to/mark_b5f4ffdd8e7cd58/the-data-model-behind-an-employee-cost-calculator-is-messier-than-the-ui-41ge)

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