Math Problem: Figure out the cheapest way to buy Sopranos: Season 1 DVD?

Question

At Barnes & Noble Sopranos costs $41.98 + 8% tax. But if you're a member it costs $37.78. Membership costs $25.00 + 8% tax. If you sign up for their B&N Master Card you get a 5% discount on all purchases including membership fees, plus after your first purchase you will receive a $25.00 gift certificate. You also receive free shipping for orders over $25. Would it be cheaper to buy the membership first and use the $25 gift card to buy the Sopranos or to not buy a membership and just use your credit card to buy the Sopranos and the $25 gift card to buy something else later?

Answer 1

If you plan to use the service more than this once, it's cheaper to buy the membership.