$\backslash$table$[[,$To$,],[$From$,$Los Angeles,Calgary,Panama City,Supply$],[$Mexico City,$$6,$$$18,$$$8,120],[$Detroit$,$$$17,$$$13,$$$19,70],[$Ottawa$,$$$20,$$$10,$$$24,50],[$Demand$,80,100,60,]]$

$($Note: You must enter a shipment in every cell, even if the shipment is $0.)$

$\backslash$table$[[,$To$,$Supply$],[$From$,$Los Angeles,Calgary,Pana,ity$],[$Mexico City,$$6,,$$$18,,$$$8,120],[$Detroit$,$$$17,,$$$13,$T$,$$$19,70],[$Ottawa$,$$$20,,$$$10,,$$$24,50],[$Demand$,80,100,,60,,]]$