The demand for ice cream cones is p=1600 and Qd is 2. The supply of ice cream cones is p= 400 and Qs if 1.The price of a cone is expressed in cents ,and the quaquantities are expressed in cones per day.To find the equilibrium price (P*) and the equilibrium quantity (Q*) substitute Q* (for QD and QS and p.for QD, P=a-bQd and for Qs P=c+dQS)