Liva's Lumber, Inc., manufactures three types of plywood. The following table summarizes the production hours per unit in each of three production operations and other data for the problem.
|
Plywood
|
I
|
Operations (hours) II
|
III
|
Profit/Unit
|
|
Grade A
|
2
|
2
|
4
|
$40
|
|
Grade B
|
5
|
5
|
2
|
$30
|
|
Grade X
|
10
|
3
|
2
|
$20
|
|
Maximum time available
|
900
|
400
|
600
|
|
How many units of each grade of lumber should be produced?