Suppose that the supply and demand for coffee-makers is given by:

Supply: Qs = 160 + 2.25P

Demand: Qd = 200 + 0.2I - 0.25P

Where P = the price per coffee-maker and I = Income. The current value of I is 600.

a) Find the current equilibrium Price and Quantity of coffee-makers. Show all your work.

b) Find the equilibrium Price and Quantity of coffee-makers if the level of Income increases to 800. Show all your work.