A company purchases machines that cost $19,500.00 each (at t=0). Annual maintenance is $14,000.00 per machine. Three years later the company upgraded at a cost of $10,000.00 per machine and making the annual maintenance cost to be $6,000.00 the first year, increasing $1000.00 each year thereafter. What is the equivalent uniform annual cost of one machine in years 1 through 7 at an interest rate of 7% per year?