Thread: graphing three different data sets onto one chart

I have three different data sets:

X number of sales for one particular item on various days at various prices
X number of sale for a different item on different days at different prices
and yet a third X number of sale for a particular item at different prices/days.

The prices and days sold are no too far apart, however, i want to show the trend of prices for each item on one chart. Help please.

Thanks so much