Sources

Accounting

Investopedia - Income Statement: How to Read and Use It
Investopedia - How Do You Read a Balance Sheet
Investopedia - Accounting Explained with Brief History and Modern Job Requirements
Investopedia - Double Entry: What It Means in Accounting and How It's Used
Bench - Cash Basis Accounting vs. Accrual Accounting
Investopedia - The 8 Important Steps in the Accounting Cycle
Bench - A Beginner's Guide to the Accounting Cycle
CFI - Income Statement

Ratios

Investopedia - Acid-Test Ratio: Definition, Formula, and Example
Investopedia - What Is the Asset Turnover Ratio?
CFI - Current Ratio Formula
Investopedia - Cash Ratio: Definition, Formula, and Example
Investopedia - What is the Debt Ratio?
Investopedia - Debt-to-Equity (D/E) Ratio Formula and How to Interpret It
CFI - Earnings Per Share (EPS)
CFI - Price Earnings Ratio
CFI - Net Profit Margin