This document provides an overview of key bar math concepts for calculating costs and profits related to liquor sales. It explains how to determine shots per bottle, cost per ounce, portion cost, cost percentage, gross profit, and gross profit margin based on liter and 750ml bottle sizes. Worked examples are provided for each calculation using sample liquor bottles and pricing. The goal is to demonstrate the relationships between these metrics and how adjusting factors like serving size or sales price impacts costs and profits.