cost[oil,period]

Cost of raw oil per period

hardness[oil]

Hardness of raw oil

revenue_per_ton

Revenue per ton of final product

veg_ub

Tons of vegetable oils that can be refined per period

nonveg_ub

Tons of non-vegetable oils that can be refined per period

store_ub

Tons of raw oil that can be stored per period

storage_cost_per_ton

Storage cost per ton of raw oil per period

hardness_lb

Lower bound on hardness of final product

hardness_ub

Upper bound on hardness of final product

init_storage

Initial tons of each type of raw oil in storage

hardness_sol[period]

Hardness of final product per period