Suppose you are plan to purchase an apartment building that has 12 units that can be rented out at $1,260 per month. You have estimated operating expenses and expected vacancy and collection losses for the first year to be $35,700 and $30,240, respectively. You also have estimated that you will be able to generate an additional $3,840 in the first year from garage rentals on the property. If the expected purchase price of the property is $1,100,000 and you are planning on making a 10% down payment, calculate the debt yield ratio.