Compute the cross elasticity of demand and characterize the goods as complements or substitutes (Please use "Arc Elasticity" to calculate)
a. Regular Flu shot offered by pharmacy Boxes of Tamu Flu sold by pharmacy
Price: $60/shot 720 boxes/week
Price: $80/shot 580 boxes/week
b. Conventional Dental cleaning copay Alternative medical service visit made
Price: $80/per cleaning 5,600 visits/year
Price: $100/per cleaning 6,400 visit/year