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To raise the pitch of a certain piano string, the piano tuner:
Plane Operating Costs
Expenses associated with the operation of an aircraft, including fuel, maintenance, crew salaries, and insurance.
Passengers
Passengers refer to individuals who travel in a vehicle but are not directly involved in the vehicle's operation, often regarded in contexts such as public transportation, airlines, and automobiles.
Supplies Cost
The cost associated with the items and materials used in the operation of a business.
Spending Variance
The difference between the budgeted or planned amount of expense and the actual amount spent.
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