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Before the advent of intercoms, old mansions had a sash in each room. Each sash was connected to a bell on a master board in the servants' office. When someone pulled a sash in a particular room, a bell corresponding to the room would ring on the master board, informing a servant where to go to provide assistance.
This system is similar to which of the following?
Utility And Usage Revenue Model
A business model where customers pay based on their usage of a service or product, emphasizing the utility value derived from using the product.
Fees
Charges imposed by service providers on consumers for the services offered.
Cost Of Goods Sold
The direct costs attributable to the production of the goods sold by a company, including materials and labor.
Operating Expenses
Costs associated with the day-to-day operations of a business, including rent, utilities, and payroll.
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