$$f$)$ As$$ mentioned, the cooperative uses the storage bin heavily only $2$ weeks per year. Farmers estimate that enlarging the bin would cut unloading costs by $50\%$ next year. It will cost $$$$9$ comma $000$ to do so during the$$ off$-$season.

The one year net$$ cost$/$benefit to enlarge the storage area$=$$

$$

enter your response here $($round your response to the nearest whole$$ number$).$