# Companion worksheet instructions

Import CSVs into Excel, Google Sheets, or another spreadsheet application. Formula cells start with = and are intentional calculation formulas. Enable formula interpretation for these supplied files. Do not paste untrusted external text as executable formulas. Blank inputs are not validated business assumptions. Replace every relevant blank and confirm the quote or operating rule before relying on totals. Percent inputs use decimals (0.2 means 20%). Money is USD unless explicitly stated.

Cost sheets use additive subscription and usage fees. Adapt formulas for included allowances, tiered rates, minimums, taxes, and credits. Row 21 annualizes a steady month; use monthly-cost-forecast.csv for seasonality. Hypothetical rates are not vendor prices.