MS Excel urgent help needed

Hi guys, I've got to hand this out tomorrow and I still have one tiny problem:
I've made a chart and on the lines there are two point which I need to drop lines from.
This is a scattered type chart and I can't find the option while in Line chart I can but the Line chart doesn't do what I need.
Here is a pic:
I need lines to go out from points C1 and C0 to their value in the X and Y axis.
Thanks guys.

Just add 4 more series to the plot.

- Series 1. Horizontal line from y-axis to point C1: X values [0, ~150], Y values [~500 ~500]
- Series 2. Vertical line from x-axis to point C1: X values [~150 ~150], Y values [0 ~500]

Repeat for point C2 (series 3 and 4).

PS: The chart "type" is just a template. You can manually edit the line style, marker style, etc. You can put lines on a scatter plot and points on a line plot.

cool...btw what is the chart for?
nd does anyone know if hebrew works on the forums? (just wondering).
להלהלהלה אני מלך להלהלהלה.

Its a chart for my economy class, its the basic form of production and consumption possibilities.
Anyhow I found a better way, I added error lines which are soposed to simulate margin or error but I just set them at 100% so they touched the axis.
Thanks anyway and sorry about the "urgent thing" but the paper is due tomorrow.