A furniture business rents chairs for conferences. A contract is drawn to rent and deliver up to 400 chairs for a particular meeting. The exact number would be determined by the customer later. The price will be $\$ 90$ per chair up to 300 chairs. If the order goes above 300 chairs, the price would be reduced by \$0.25 per chair for every additional chair ordered above $300 .$ This reduced price would be applied to the entire order. Determine the largest and smallest revenues this business can make under this contract.