Hi, the questions are at the bottom. I went through this a zillion times and I don't get it... any help?

Seaside Motors specializes in producing one specialty vehicle. It is called Surfer and is styled to easily fit multiple surfboards in its back area and top-mounted storage racks. Seaside has the following manufacturing costs: (Click the icon to view the manufacturing costs.) Seaside currently produces 200 vehicles per month.1. What is the variable manufacturing cost per vehicle? What is the fixed manufacturing cost per month? 2. Plot a graph for the variable manufacturing costs and a second for the fixed manufacturing costs per month. How does the concept of relevant range relate to your graphs? Explain. 3. What is the total manufacturing cost of each vehicle if 65 vehicles are produced each month? 190 vehicles? How do you explain the difference in the manufacturing cost per unit?i Data Table X Plant management costs, $1,992,000 per year Cost of leasing equipment, $2, 196,000 per year Workers' wages, $900 per Surfer vehicle produced Direct materials costs: Steel, $1,700 per Surfer; Tires, $130 per tire, each Surfer takes 5 tires (one spare) City license, which is charged monthly based on the number of tires used in production: 0-500 tires 60,000 501-1,000 tires 80,000 more than 1,000 tires 240,000