Suppose that we observe two comparable properties that have each sold twice within the past four years. Property A sold 24 months ago for $500,000 and Property B sold 48 months ago for $575,000. If the two properties were sold today at $425,000 and $465,000, respectively, estimate the change in market conditions (percentage change in price) per month, assuming we equally weight the two properties in our analysis? -0.56% -0.51% 0.68% 0.61%