You just started up a retail store. After one month goes by you find that you are owed $10,000 by customers who bought merchandise but havent paid for it yet and you owe suppliers $2,000 for merchandise youve bought from them but havent yet paid for. Your partner did some work in the store and discovered you have $3000 worth of merchandise in the store. How much cash do you have tied up in your business by working capital?