Reference no: EM13200774

Sandra purchases 5 pounds of coffee and 10 gallons of milk per month when the price of coffee is $10 per pound. She purchases 6 pounds of coffee and 12 gallons of milk per month when the price of coffee is $8 per pound. Sandra’s cross-price elasticity of demand for coffee and milk is 

A. 0.82, and they are substitutes. 

B. -0.82, and they are complements. 

C. 1.22, and they are substitutes. 

D. -1.22, and they are complements.