Regression analysis was applied between sales data (in $1000s) and advertising data (in $100s), and the following information was obtained. ŷ = 12 + 1.8x n = 17 ssr = 225 sse = 75 sb1 = 0.2683 refer to exhibit 14-3. based on the above estimated regression equation, if advertising is $3,000, then the point estimate for sales (in dollars) is