The $102-$story Empire State Building in New York City is visited by $4$ million tourists each year. Cleaning supplies are purchased regularly in bulk to clean all public spaces, including $73$ elevators, $1,576$ steps, two observation decks, and the lobby. As far as different buy classes are concerned, these custodial supplies are deemed $\_\_\_\_\_\_\_.$

The $102-$story Empire State Building in New York City is visited by $4$ million tourists each year. Cleaning supplies are purchased regularly in bulk to clean all public spaces, including $73$ elevators, $1,576$ steps, two observation decks, and the lobby. As far as different buy classes are concerned, these custodial supplies are deemed $\_\_\_\_\_\_\_.$

modified rebuys

new$-$task buys

straight rebuys

systems selling