The demand for gula apong ice cream for all its subsidiaries is given by the following regression results. Q =240-7P_X 4.5P_TS 20Y 6A (400) (3.2) (3.2) (6.5) (2.6)) R^2=0.90 Price total revenue maximized= RM250 DW=2.23 Standard error of estimation (SEE)=8.73 Standard errors in parentheses where, Q= demand for ice cream gula apong P_ = average price of ice cream gula apong, RM250 P_TS = average price of other ice cream company, RM200 Y = per capita income, RM40 A = average advertising expenditure, RM20 At the total revenue maximizing price, construct the range of quantity demanded at the 95 percent confidence interval