A.    Sets, subsets and indexes
a	Food groups
afv $\subseteq$ a	Fruits and vegetables food groups
aA $\subseteq$ a	Food groups with animal proteins
aV $\subseteq$ a	Food groups with vegetal proteins
p	Population groups
r	Macronutrients (including energy)
B.    Parameters and scalars (capital letters)
NUTar	Nutritional contribution [kg/kg or kcal/kg]
NECpr	Nutritional requirements [kg/kg or kcal/kg]
PENp,r	Cost for non-supplied nutrient [EUR/kg or EUR/kcal]
PREa	Price [EUR/kg or EUR/kcal]
DONa	Donations [kg]
CARDp	# people [1, ∞)
CALr	# of kcal [kcal/kg]
MCALr	Maximum calories to be derived from a macronutrient [%]
QFVp	Minimum quantity of fruits and vegetables to be consumed [kg]
AVSPp	Minimum amount of animal proteins for the bioavailability of vegetal proteins [kg/kg]
C.    Continuous positive variables (lower letters)
ca	Food purchased by the food bank [kg]
sap	Food distributed to beneficiary groups [kg]
ea	Donation excess [kg]
cnspr	Non-supplied nutrients [kg or kcal]