the CDs sell for $12 each and the CDs sell for $6. last year the company sold a total of 2000 CDs and DVDs combined. if the revenue was 15,000 how many DVDs and how many CDs were sold Solution Let DVD sold out to be x then total revenue = x*12+(2000-x)*6 = 15000 x = 3000/6 = 500 so DVDs are 500 and CD 1500.