Which issues of the RollingStone sold the best in Canada in the first half of 2015?

Below are the three best sellers, along with the worst seller. Take you best guess then check the answers at the bottom of the page.

No Peeking.

Hint:  One of these was on sale for four weeks


2015-02 (On Sale Dec 8th, 2014)

2015-22 (On Sale May 11th,2015)

2015-24 (On Sale May 25th, 2015)

2015-30 (On Sale Jun 22nd, 2015)


Results Below:

And the Results:

    1. 2015-02 Seth Rogan:  Sold 13,688 at a 50% sell-thru (On sale 4 weeks helped)
    2. 2015-30 Rush:  Sold 8,345 at a 34% sell-thru  (Our Boys)
    3. 2015-22 David Letterman:  Sold 5,986 at a 28% sell-thru  (Legend Retires)
    4. 2015-24 Greatful Dead:  Sold 2,836 at a 13% sell-thru  (Way too Groovey)