Metropolitan Water Utilities purchases surface water from Elephant Butte Irrigation District at a cost of $100,000 per month in the months of February through September. Instead of paying monthly, the utility makes a single payment of $800,000 at the end of each calendar year for the water it used. The delayed payment essentially represents a subsidy by Elephant Butte Irrigation District to the water utility. At an interest rate of 0.25% per month, what is the amount of the subsidy?