A campaign manager for a political candidate must arrange the shipment of 150 cartons of campaign buttons from three button producers to three campaign headquarters.The supplies and demands,and the per-carton transportation costs,are shown below: 
Which of the following is a constraint for the customer (campaign headquarters) ?
Definitions:
Schizophrenia
A chronic brain disorder that affects less than one percent of the population, characterized by delusions, hallucinations, disorganized speech or behavior, and impaired cognitive ability.
Mentally Healthy
Refers to a state of well-being in which an individual realizes their own abilities, can cope with the normal stresses of life, can work productively, and is able to make contributions to their community.
Self-deceptions
The act of lying to oneself or convincing oneself of untruths or half-truths, often to avoid facing uncomfortable facts or emotions.
Delusions
Firmly held false beliefs not based in reality, often stemming from mental illness such as schizophrenia.
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