!ENCE 360, Diet LP, LINDO formulation
!Dr. Steven A. Gabriel
!Need to eat from 4 basic food groups
!Nonnegativity of variables assumed
!
min 50x1 + 20x2 +30x3+80x4              ! total cost of diet in cents
s.t. 
400x1 + 200 x2 +150x3 +500x4 >=500   	! (Calorie constraint)
3x1+2x2 >=6                             ! (Chocolate constraint)
2x1+2x2+4x3+4x4>=10             	! (Sugar constraint)
2x1+4x2+x3+5x4>=8 			! (Fat Constraint)
end
! nonnegative variables assumed