**transportation**(

`+Supplies, +Demands, +Costs, -Transport`)

`Supplies`and

`Demands`must be lists of non-negative integers. Their respective sums must be equal.

`Costs`is a list of lists representing the cost matrix, where an entry (

*i*,

*j*) denotes the integer cost of transporting one unit from

*i*to

*j*. A transportation plan having minimum cost is computed and unified with

`Transport`in the form of a list of lists that represents the transportation matrix, where element (

*i*,

*j*) denotes how many units to ship from

*i*to

*j*.