Ron bought a $28,000, 26-week T-bill at a discount rate of 5.6% on August 14. He sold it 11 weeks later at a discount rate of 6.2%. Find Ron's purchase price, the discount 11 weeks later when he sold it, the proceeds to Ron, and the effective interest rate for the time he held the note. (Hint: Treat T-bills as a discount note.) Ron's purchase price was $ (Round to the nearest cent as needed.)