Timeseries chart - combining values of field to create multiple series

[d.b]

I have data that looks like this:

date	store	purchases	returns
2014-12-29	Store A	6000	800
2015-01-05	Store A	26000	4000
2014-12-29	Store B	1300	600
2015-01-05	Store B	4900	2000

 

How do I create a timeseries chart which would create 4 lines? The X axis would be date, Y axis count, Line 1 = Store A Purchases, Line 2 = Store B Purchases, Line 3 = Store A Returns, Line 4 = Store B Returns.

Right now, all I am able to successfully get is 2 lines with Store A Purchases and Store B Purchases.

Thanks

[d.b]

Used multi axis charts