A salesman earns a base salary of $2,400 a month plus a 5% commission on all sales. Write a function that gives the salesman’s monthly salary in terms of sales. Use the function to determine the monthly sales required to earn at least $3,600 a month.

Answer 1

y = 2400 + 0.05x
now solve
2400 + 0.05x ≥ 3600