Let
e = Gibson Explorer’s = 20
v = Gibson Flying V’s
So, our problem is
Maximize
Money = 80e + 5v
Subject to
0 ≤ e ≤ 20
0 ≤ v ≤ 20
0 ≤ e + v ≤ 30
In order to solve this problem, we look at the graph (attached), and find the value of Money =80e + 5v at corner points to find the maximum value of money.
(e,v)=(0,0) >> Money = 80e+5v = 80*0+5*0 = 0
(e,v)=(0,20) >> Money = 80e+5v = 80*0+5*20 = 100
(e,v)=(20,0) >> Money = 80e+5v = 80*20+5*0 = 1600
(e,v)=(20,10) >> Money = 80e+5v = 80*20+5*10 = 1650 (maximum)
(e,v)=(10,20) >> Money = 80e+5v = 80*10+5*20 = 900
So Bob can make the most money = $1,650 when he makes and sell
e = Gibson Explorer’s = 20
v = Gibson Flying V’s = 10