please answer

"Your Engine or Mine" is a local manufacturer of four-stroke single-cylinder engines in College Station. This year (year 1), the cost for machining the engine block is $600. The company expects this cost to decrease based on a new law passed by the US Congress. If the cost in year two and each year thereafter decreases by $50, what is the equivalent annual cost for four years at an interest rate of 10% per year compounded quarterly