XYZ, inc. makes and sells bicycle parts. Last year XYZ sold 5,300 handlebars, generating sales of $110,000. This year they are considering a new pricing strategy with a target profit goal of $19,000. They determined that for every $1 increase to the selling price, a 300 decrease in unit sales was expected. Their total costs were $110,000 with fixed costs accounting for $60,000. This year, XYZ, inc. is considering changing the selling price to $27. Assuming that the demand function is linear, what is the slope of demand?