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:
Sexual Partners
Individuals with whom one engages in sexual activities, highlighting various types of intimate physical relationships.
Unused Functioning
Refers to capacities or abilities of an individual or system that are not currently being utilized or activated.
Organ Capacity
The maximum level or potential at which an organ can function, reflecting its health and the ability to carry out its physiological tasks.
For-profit Colleges
are higher education institutions operated by private, profit-seeking businesses, often offering career-oriented courses.
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