Exhibit 0064 Price Per Unit 9 8 7 6 5 4 e 3 f 2 g 1 h D Qii 0 10 20 3040506070 80 90 Between points b and c in Exhibit 0064, price decreases by $1 (om $7 to $6), quantity demanded increases by 10 (from 20 to 30 units): total revenue decreases by $1, and demand is elastic total revenue decreases by $1, and demand is inelastic total revenue increases by $40, and demand is elastic total revenue increases by $40, and demand is inelastic total revenue increases by $80 rho 9-991