set FOOD := milk cheese apples;
set NUTR := protein vitamin_A, vitamin_B, vitamin_C;

param: cost :=
milk  1
cheese	2.5
apples	0.75;

param: rda_min :=
protein	       80
vitamin_A      60
vitamin_B      50
vitamin_C      30;



param  amt:
		milk	cheese	apples :=
protein		40	20	10
vitamin_A	5	40	30
vitamin_B	20	30	40
vitamin_C	30	50	60;