48 42 X 36 30 PRICE Y 24 18 Z 12 Demand 200 400 600 800 1000 1200 1400 1600 QUANTITY Refer to Figure 5-5 . If the price decreased from $36 to $12, total revenue would Oa. decrease by $7,200, and demand is inelastic between points X and Z. Ob. decrease by $4,800, and demand is inelastic between points X and Z. Oc. increase by $7,200, and demand is elastic between points X and Z. Od. increase by $4,800, and demand is elastic between points X and Z