Grid 1	Two-Dimensional Economics
Grid 2	Slope of a Line
Grid 3	Production
Grid 4	Distribution
Grid 5	Demand Shift
Grid 6	Shift in Supply
Grid 7	Equilibrium Price
Grid 8	Simultaneous Shifts
Grid 9	Demand Elasticity
Grid 10	Total Revenue test
Grid 11	Consumer Surplus
Grid 12	Efficiency
Grid 13	Income Tax
Grid 14	Externalities
Grid 15	Budget Line
Grid 16	Total and Marginal
Grid 17	Indifference Curve
Grid 18	Consumer Optimum
Grid 19	Marginal and Average
Grid 20	Aggregation
Grid 21	Profit
Grid 22	Perfect Competition
Grid 23	Monopoly
Grid 24	Oligopoly