Asalesperson makes a base salary of $2000 per month. once he reaches $40,000 in total sales, he earns an additional 5% commission on the amount in sales over $40,000. suppose the salesperson sold 95,000 worth of merchandise, what was his salary for that month? suppose the salesperson's total salary for the month was $4,800, what was his total sales for the month? find s(25000) and interpret what it means in context of the problem.