์ผ๋ณธ์ •๋„ ๊ฐ€์น˜ํ‰๊ฐ€๋งŒ ๋ฐ›์•„์•ผํ•œ๋‹ค = 4,500

๋ฌด์Šจ์†Œ๋ฆฌ ์ผ๋ณธ์€ ํ‹€๋”ฑ๊ธฐ์—…๋“ค์ด ์ฃผ๋ผ ๊ทธ๋ ‡๊ณ  ์šฐ๋ฆฐ ๊ทธ๋ž˜๋„ ๋ฐ˜๋„์ฒด๊ฐ€ ์„ž์—ฌ ์žˆ๋‹ค = 5,400

๋ฌด์Šจ์†Œ๋ฆฌ ๋Œ€๋งŒ์ฒ˜๋Ÿผ ์šฐ๋ฆฌ๋‚˜๋ผ๋„ ๋ฐ˜๋„์ฒด ๋“ฑ ์ฒจ๋‹จ it ์ฃผ์‹์ด ๊ณผ๋ฐ˜์ด ๋ ๊ฒƒ์ด๋‹ค = 7,000