Balancing Entertainment

Jasmine can buy 3 CDs and 3 cassette tapes for the same price as 4 video cassettes. She has enough money to buy 252 video cassettes. How many videos can she buy if she wants to buy an equal number of CDs, tapes, and videos and if she spends all her money?

(Source: Adapted from Mathematics Teaching in the Middle School, Sep 1997)