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[JJ6000]

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[jeroen79]

F=C*9+W*3
L=C*0.75+W*1
P=C*60+W*40
and
W=6000-C

[Rassis]

Being C the number of ha to be planted with Corn and W with Wheat, we have:

Objective function: max.P = 60.C+ 40.W

Sbject to the constraints:

9.C + 3.W <= 40,500
3/4.C + 1.W <= 5,250
C + W = 6,000
C >= 0
W >= 0

The Simplex method or the Excel Solver will return:

C = 3,750 ha and W = 2,250 ha.
Max P = £ 315,000

See the attached Excel file.