please help

1. Working capital is Current Assets - Current Liabilities. Why would a Classified Balance Sheet make calculating this amount much easier? 2. What is the difference between a sales discount and a purchase discount? 3. What is the difference between the single-step and multiple-step Income Statement formats? 4. Using Periodic, what would the journal entry be to record $1,000 sales on credit to a customer that cost the company $3007 5. Using Perpetual, what would the journal entry be to record $1,000 sales on credit to a customer that cost the company $300