Verizon offers to sell cellular phones listing for $100.54 with a chain discount of 15/10/5. Cellular Company offers to sell its cellular phones that list at $104.09 with a chain discount of 25/5. If Irene is to buy seven phones, how much could she save if she buys from the lower-priced company? Note: Do not round intermediate calculations. Round all dollar amounts to the nearest hundredth. Round your final answer to the nearest cent