Office Depot has two Casio graphing calculators on clearance, as long as you can pick them up from the store. The fx-9750G lists for $50, but drops to just $14 with in store pickup, with the fx-7400G lists for $40, and can be had for $10. These items will be useful in calculating exactly how many times you will be rejected by your female classmates before building a robot girlfriend to keep you company.
fx-9750G Catalog Page [OfficeDepot]
fx-7400G Catalog Page [OfficeDepot]
