That's So Raven S03 E26 Point of No Return

"She can see the future. But she can't quite see what's coming next."

Raven needs a new Scientific Calculator for Trigonometry in school which costs $100.She buys a shirt instead to wear to a party. Meanwhile Cory is freaking out because he has to go shopping with his dad and cory feels he's too old to be shopping with his father.