The Balance Sheet at the beginning of the month shows Total Liabilities of $30500 and during the month the following transactions occurred: (a) Sold services in cash for $2,980; (b) Purchase office supplies on account for $10,400; (c) Paid owed salaries from last month for $4,890; (d) Received a cash payment from a customer that owed $7,500 on account; and paid current month rent for $5,000. Required 1: What are Total Liabilities at the end of the month? Required 2: By how much did the Total Assets change? Required 3: If these were all transactions, how much is the net income (loss) of the period? In case of loss, use "'" (minus sign)