please help me get 100%, write down the x,y for starting point and ending point for Total sales revenue, fixed expense and total expense. Also please point what I did wrong to get 83%

Retu Required information Volume in Units Required information [The following information applies to the questions displayed below.] Karlik Enterprises distributes a single product whose selling price is $24 per unit and whose variable expense is $18 per unit. The company's monthly fixed expense is $24,000. Required: 1. Prepare a cost-volume-profit graph for the company up to a sales volume of 8,000 units. (Use the line tool to draw three lines (Total Sales Revenue, Fixed Expense, Total Expense). Each line should only contain the two endpoints. For your graph to grade correctly, you must enter the exact coordinates. Once all points have been plotted, click on the line (not individual points) and a tool icon will pop up. You can use this to enter exact co-ordinates for your points as needed. To remove a line from the graph, click on the line and select delete option.)