a. Q = 1,000 – 240 P + 80 PC
Q = 1,000 – (240 * 1.5) + (80 * 1.20)
Q = 1,000 – 360 + 96
Q = 736
b. Q = 1,000 – 240 P + 80 PC
Q = 1,000 – 240 P + (80 * 1.20)
Q = 1,000 – 240 P + 96
Q = 1,096 – 240 P
c. Q = 1,000 – 240 P + (80 * 1.50)
Q = 1,000 – 240 P + 120
Q = 1,120 – 240 P
The demand curve shifts upward by 24 drinks per day