This document discusses three liquidity ratios: the cash ratio, quick ratio, and interval measure ratio. The cash ratio is calculated as cash plus marketable securities divided by current liabilities. The quick ratio adds receivables to the numerator. The interval measure ratio adds receivables to the numerator and uses average daily expenditures from operations as the denominator. The document also provides information about Drawpack.com, a website that offers free business diagrams and templates for personal use.