```python
def hour_rate(rate: int) -> int:
    return rate


def week_pay(hours: int, rate: int) -> int:
    """Pay for a week, with overtime beyond forty hours."""
    if hours > 40:
        overtime_rate = rate * 1.5
        return 40 * hour_rate(rate) + (hours - 40) * overtime_rate
    return hours * hour_rate(rate)
```