Line Graph Problem

So, I have three time series that look like this

	A	B	C
Jan	10	100	300
Feb	20	120	310
Mar	15	130	295
Apr	30	200	400

etc.
obviously when i try to plot the data to a line graph with only 1 Y-axis, the A series look flat down under. (something like this http://officeimg.vo.msecnd.net/en-us...A010227707.gif)
I then try to separate them into 2 graph "A vs B" and "A vs C" and with 2 Y-axis, but this still doesn't work, what the "A vs B" graph show is both line start and end at similar location, despite that over the course of the period A has tripled while B has only doubled.
Is there a graph that allows me to compare these series?

thanks for the reply, but this look so complicated that I might just do add a multiplier to the series to make them comparable..... Thanks