Julia has been promoted to chief salesperson of Seaside Computers. She has two choices as to how she will be paid. She can receive $50 for every computer system she sells, or she can receive $250 a week plus $25 for every computer system she sells. Looking at the past year, she finds that she has averaged 9.3 sales per week, and she figures that she can do a little better this year. How should Julia choose to get paid? 4. 5 points) A linear cost function models the cost C(x) to produce x items. C(x)mx+b mis the variable cost per item and b is the fixed cost. A linear revenue function models revenue R for selling x items. R(x)-px, p is the price per item. A linear profit function models the profit for producing and selling x items