A farmer sells almonds according to the chart below. The more pounds of almonds that are sold, the lower the cost per pound is for the entire order of almonds. Almond Prices Number of Pounds Cost (per Pound) up to 10 $20 more than 10, and up to 20 $15 more than 20, and up to 30 $10 more than 30 $5 The farmer graphs a step function to model the situation, where y represents the cost per pound for an order of x pounds of almonds. Which of the following describes the farmer’s graph for the step that includes 20.75 pounds, and what is the total cost of 20.75 pounds of almonds? a horizontal segment with an open circle at (20, 10) and a closed circle at (30, 10); $207.50 a horizontal segment with a closed circle at (20, 10) and an open circle at (30, 10); $207.50 a horizontal segment with an open circle at (21, 10) and a closed circle at (30, 10); $311.25 a horizontal segment with a closed circle at (21, 10) and an open circle at (30, 10); $311.25