Concept: The payment for work done per hour is the basic rate paid to a worker for each hour of labour supplied.
Explanation:Payment for work can be classified by the time unit used.
When money is paid for each hour worked, it is called a wage rate.
Salary is usually fixed and paid monthly or annually, not per hour.
Cost refers to the total expense to the employer, not the hourly payment.
Bonus is an extra payment given for good performance, not for each hour worked.
Therefore, the money paid per hour for work done matches the meaning of wage rate.
Answer: B. wage rate.