The cost of a 1-pound phosphorous credit in the York and Rappahannock. watersheds in on a sliding scale from $17,000 to $20,000 and $14,700 to $16,450, respectively. The cost of credits in the York and Rappahannock watersheds decreases as more credits are.
Strictly speaking, the term server refers to a computer program or process (running program). Through metonymy, it refers to a device used to (or a device dedicated to) running one or several server programs. On a network, such a device is called a host. In addition to server, the words serve and service (as noun and as verb) are frequently used, though servicer and servant are not.
Strictly speaking, the server is the software that handles a task. However, the powerful hardware that supports this software is also usually called a server because server software coordinating a network of hundreds or thousands of clients requires hardware much more robust than what you'd buy for ordinary consumer use.