John Mart's management wants to maintain a minimum monthly cash balance of $5,000. At May 1, its cash balance is $5,100, expected cash receipts for May are $98,400, and cash disbursements are expected to be $106,200. How much cash must John Mart borrow to maintain the desired minimum monthly balance? (Enter negative amounts using either a negative sign preceding the number e.g. -45 or parentheses e.g. (45).) Financing: O $