1. It was observed in a particular supermarket that after the price of good X dropped from 20 pesos to 17.50 pesos, the weekly demand for the said products increased from 150 units to 220 units. Solve for the Price Elasticity of Demand, then identify whether the consumer demand for good X is elastic, inelastic, or unit elastic. 2. As observed in a certain appliance store when the price of electric fan increased from 1000 to 1200 the demand for air conditioners increased from 8 to 10 units. Calculate for the cross-price elasticity and indicate whether the two goods are complements or substitutes. 3. Jorge's salary increased from P12, 500 to P13, 800 consequently his consumption for good X increased from 30 to 35. Compute for the income elasticity of demand and indicate if good X is a normal, inferior or luxury good