A construction company requires 20 bulldozers to complete their jobs for the next 7 years. They must decide to either lease the equipment or purchase new equipment directly. The company uses an interest rate of 14% for all transactions. To lease a bulldozer the company would have to pay a $250,000 signing fee now and a $300,000 yearly fee at the end of each year. The company providing the lease pays all maintenance costs. The purchase price of a new bulldozer is $650,000 with annual maintenance costs of $100,000 for the first year and increases by $45,000 a year. The bulldozer will have a salvage value of $150,000 at year 7. Purchasing more than 10 bulldozers results in a 12% savings on initial price. What should the company do?