4. A sales assistant is paid commission of 3% on sales which she makes. During a certain week she sells $8000 worth of goods. If her basic weekly wage is $82, calculate her total earnings for the week. 5. An agent selling agricultural machinery is paid a basic wage of $120 per week. In addition he is paid a commission of 5% on sales that he makes. During one week he makes sales totalling $9000. Calculate the agent's total wage for this week.