Reliable Safe Companys 2005 balance short showed total current assets of $1,500,000 plus $3,000,000 of net fixed assests. Al of these assets were in operario a. The firm has $600,000 of current liabilities, including $300,000 of common stick, and $1,750,000 of retained earings. What was total amount of investir-provided operating capital at the ene of 2005?