Final answer:
Liquidity ratios, profitability ratios, and solvency ratios should be calculated for Phone Corporation.
Step-by-step explanation:
To evaluate the financial health and performance of Phone Corporation, several financial ratios should be calculated. These ratios include liquidity ratios which measure the company's ability to meet short-term obligations, such as the current ratio and quick ratio. Profitability ratios should also be calculated, such as gross profit margin, net profit margin, and return on equity, to assess the company's profitability. Additionally, solvency ratios like debt-to-equity ratio and interest coverage ratio should be calculated to determine the long-term solvency of the company.