Price Quantity of
100-tablet bottle
(millions)
Total Revenue
(millions of dollars)
TR = P × Q
Marginal Revenue per 100-
tablet bottles (dollars)
MR = ΔTR/ΔQ
$20 0 $0
$18
18 1 18
14
16 2 32
10
14 3 42
6
12 4 48
2
10 5 50
−2
8 6 48
−6
6 7 42
−10
4 8 32
−14
2 9 18